Roughly how much of the Earth's excess global warming heat is absorbed by our oceans?
Anonymous Quiz
19%
20%
39%
40%
31%
60%
11%
90%
๐10
Sleepy Classes IAS
Day 25 Sleepy CSAT PYQ Series Today, we will be looking at a Quant Question. We alternate between RC, LR and Quant PYQs in this series. Try to solve it. Solutions will be provided later today.
Solution to Today's CSAT PYQ
Notice that every single number in this sequence is odd.
Also, notice the number 5 is sitting right there in the series.
Any odd number multiplied by 5 will always end in a 5.
Because there is absolutely no even number in this series to turn that 5 into a zero, the unit digit is mathematically guaranteed to be 5.
Option C is your answer.
Notice that every single number in this sequence is odd.
Also, notice the number 5 is sitting right there in the series.
Any odd number multiplied by 5 will always end in a 5.
Because there is absolutely no even number in this series to turn that 5 into a zero, the unit digit is mathematically guaranteed to be 5.
Option C is your answer.
โค4๐1
Sleepy Classes IAS
Roughly how much of the Earth's excess global warming heat is absorbed by our oceans?
We are surviving on a silent thermal loan.
If the oceans hadn't absorbed our excess heat, the air we breathe would be a catastrophic 36ยฐC hotter today.
โ๐ฅ๐ฒ๐ฐ๐ผ๐ฟ๐ฑ ๐ง๐ฒ๐บ๐ฝ๐ฒ๐ฟ๐ฎ๐๐๐ฟ๐ฒ๐:
Global sea-surface temperatures hit unprecedented highs (crossing 21.1ยฐC) driven by global warming and an intensifying El Niรฑo.
โ๐ข๐ฐ๐ฒ๐ฎ๐ป๐ ๐ฎ๐ ๐๐น๐ถ๐บ๐ฎ๐๐ฒ ๐๐๐ณ๐ณ๐ฒ๐ฟ๐:
Oceans absorb over 90% of excess global warming heat, but this causes marine ecosystem stress, disrupted food webs, and weather anomalies.
โ๐ฆ๐ฒ๐ฎ-๐๐ฒ๐๐ฒ๐น ๐ฅ๐ถ๐๐ฒ:
Global average sea levels rose about 11 cm by the end of 2025 compared to January 1993.
โ๐ ๐ถ๐๐ถ๐ด๐ฎ๐๐ถ๐ผ๐ป ๐๐บ๐ฝ๐ฒ๐ฟ๐ฎ๐๐ถ๐๐ฒ:
Urgent need to cut fossil fuels, transition to clean energy, and reduce greenhouse gas emissions.
โ๐ฆ๐๐ฟ๐ฒ๐ป๐ด๐๐ต๐ฒ๐ป๐ถ๐ป๐ด ๐๐ฑ๐ฎ๐ฝ๐๐ฎ๐๐ถ๐ผ๐ป:
India must invest in protecting its 10,000+ km coastline, restoring natural barriers, improving urban drainage, and advancing climate-resilient agriculture.
If the oceans hadn't absorbed our excess heat, the air we breathe would be a catastrophic 36ยฐC hotter today.
โ๐ฅ๐ฒ๐ฐ๐ผ๐ฟ๐ฑ ๐ง๐ฒ๐บ๐ฝ๐ฒ๐ฟ๐ฎ๐๐๐ฟ๐ฒ๐:
Global sea-surface temperatures hit unprecedented highs (crossing 21.1ยฐC) driven by global warming and an intensifying El Niรฑo.
โ๐ข๐ฐ๐ฒ๐ฎ๐ป๐ ๐ฎ๐ ๐๐น๐ถ๐บ๐ฎ๐๐ฒ ๐๐๐ณ๐ณ๐ฒ๐ฟ๐:
Oceans absorb over 90% of excess global warming heat, but this causes marine ecosystem stress, disrupted food webs, and weather anomalies.
โ๐ฆ๐ฒ๐ฎ-๐๐ฒ๐๐ฒ๐น ๐ฅ๐ถ๐๐ฒ:
Global average sea levels rose about 11 cm by the end of 2025 compared to January 1993.
โ๐ ๐ถ๐๐ถ๐ด๐ฎ๐๐ถ๐ผ๐ป ๐๐บ๐ฝ๐ฒ๐ฟ๐ฎ๐๐ถ๐๐ฒ:
Urgent need to cut fossil fuels, transition to clean energy, and reduce greenhouse gas emissions.
โ๐ฆ๐๐ฟ๐ฒ๐ป๐ด๐๐ต๐ฒ๐ป๐ถ๐ป๐ด ๐๐ฑ๐ฎ๐ฝ๐๐ฎ๐๐ถ๐ผ๐ป:
India must invest in protecting its 10,000+ km coastline, restoring natural barriers, improving urban drainage, and advancing climate-resilient agriculture.
๐7โค4
Forwarded from Sociology Sleepy Classes
Nepal GLOF is one of the scariest we have seen
Sharing how it might have happened
And most importantly is it completely natural or has man added to its own woes
https://youtube.com/shorts/zmm9x341Jvo?si=VsQR8SA9H0mU69Vy
Sharing how it might have happened
And most importantly is it completely natural or has man added to its own woes
https://youtube.com/shorts/zmm9x341Jvo?si=VsQR8SA9H0mU69Vy
โค3๐2
Day 26
Sleepy CSAT PYQ Series
Today, we will be looking at an RC Question.
We alternate between RC, LR and Quant PYQs in this series.
Try to solve it.
Solutions will be provided later today.
Sleepy CSAT PYQ Series
Today, we will be looking at an RC Question.
We alternate between RC, LR and Quant PYQs in this series.
Try to solve it.
Solutions will be provided later today.
๐3
With erratic monsoons and rising heat disrupting our supply chain, what critical infrastructure upgrade is needed to safeguard perishables?
Anonymous Quiz
67%
Flood-resilient warehouses & expanded cold chains
10%
Centralizing all crop storage in urban mega facilities
12%
โSwitching entirely to genetically modified seed varieties
11%
Building more dams and major irrigation canals
โค4๐2
What major flaw in urban planning is directly blamed for shrinking open spaces and exhausting 4 to 5 hour daily commutes?
Anonymous Quiz
22%
Rapid influx of distress migrants from rural areas
36%
Car-centric design prioritizing vehicles over pedestrians
30%
โConstruction of high-density residential skyscrapers
13%
Over reliance on outdated public bus networks
โค4๐3
Sleepy Classes IAS
With erratic monsoons and rising heat disrupting our supply chain, what critical infrastructure upgrade is needed to safeguard perishables?
โ๐๐ผ๐ผ๐ฑ ๐ฆ๐ฒ๐ฐ๐๐ฟ๐ถ๐๐ ๐ฃ๐ฟ๐ผ๐ด๐ฟ๐ฒ๐๐:
India transitioned from 1960s aid dependency to a major food producer subsidizing 800 million people via the NFSA, 2013.
โ๐๐น๐ถ๐บ๐ฎ๐๐ฒ ๐ฉ๐๐น๐ป๐ฒ๐ฟ๐ฎ๐ฏ๐ถ๐น๐ถ๐๐ถ๐ฒ๐:
Rising temperatures, erratic monsoons, and extreme weather disrupt crop yields, storage, and transport infrastructure across the value chain.
โ๐ฃ๐ฟ๐ผ๐ฐ๐๐ฟ๐ฒ๐บ๐ฒ๐ป๐ ๐๐ถ๐๐ฒ๐ฟ๐๐ถ๐ณ๐ถ๐ฐ๐ฎ๐๐ถ๐ผ๐ป:
Moving beyond concentrated rice-wheat systems to include climate appropriate millets, pulses, and local crops strengthens dietary diversity and reduces risk.
โ๐ฅ๐ฒ๐๐ถ๐น๐ถ๐ฒ๐ป๐ ๐๐ป๐ณ๐ฟ๐ฎ๐๐๐ฟ๐๐ฐ๐๐๐ฟ๐ฒ:
Upgrading to flood resilient warehouses, expanding cold chains, and implementing climate resilient farming tools are critical for safeguarding perishables.
โ๐ฃ๐ผ๐น๐ถ๐ฐ๐ ๐ฆ๐ต๐ถ๐ณ๐:
National policy must transition from basic food security to "sustainable food security," embedding climate risk management directly into NFSA planning.
India transitioned from 1960s aid dependency to a major food producer subsidizing 800 million people via the NFSA, 2013.
โ๐๐น๐ถ๐บ๐ฎ๐๐ฒ ๐ฉ๐๐น๐ป๐ฒ๐ฟ๐ฎ๐ฏ๐ถ๐น๐ถ๐๐ถ๐ฒ๐:
Rising temperatures, erratic monsoons, and extreme weather disrupt crop yields, storage, and transport infrastructure across the value chain.
โ๐ฃ๐ฟ๐ผ๐ฐ๐๐ฟ๐ฒ๐บ๐ฒ๐ป๐ ๐๐ถ๐๐ฒ๐ฟ๐๐ถ๐ณ๐ถ๐ฐ๐ฎ๐๐ถ๐ผ๐ป:
Moving beyond concentrated rice-wheat systems to include climate appropriate millets, pulses, and local crops strengthens dietary diversity and reduces risk.
โ๐ฅ๐ฒ๐๐ถ๐น๐ถ๐ฒ๐ป๐ ๐๐ป๐ณ๐ฟ๐ฎ๐๐๐ฟ๐๐ฐ๐๐๐ฟ๐ฒ:
Upgrading to flood resilient warehouses, expanding cold chains, and implementing climate resilient farming tools are critical for safeguarding perishables.
โ๐ฃ๐ผ๐น๐ถ๐ฐ๐ ๐ฆ๐ต๐ถ๐ณ๐:
National policy must transition from basic food security to "sustainable food security," embedding climate risk management directly into NFSA planning.
โค13๐2๐ฅฐ1
Forwarded from Sociology Sleepy Classes
Why the new age marxists criticised Marx for his views on religion
Let me share some insights
https://youtu.be/dIfkRsyBEyQ?si=wdgL0FNrNsdKYPqE
Let me share some insights
https://youtu.be/dIfkRsyBEyQ?si=wdgL0FNrNsdKYPqE
YouTube
Why New Marxists Disagreed With Marx's Idea of Religion | Sociology
Karl Marx and Neo-Marxist theories of religion are an important part of understanding Sociology
Especially for understanding religion
In this lecture we understand Karl Marxโs theory of religion and how later Neo-Marxist thinkers expanded and criticisedโฆ
Especially for understanding religion
In this lecture we understand Karl Marxโs theory of religion and how later Neo-Marxist thinkers expanded and criticisedโฆ
๐2
Dear @โจallโฉ
Thinking of APFC 2026?
Join *Shekhar Sirโs FREE 4-Month Strategy Workshop* to plan your preparation, prioritise topics, and make the most of the next four months.
Saturday, 29 August | 5 PM | Live on Zoom
Reserve Your Free Seat:
https://lp.sleepyclasses.com/upsc-epfo-apfc-workshop?source=CRM
Thinking of APFC 2026?
Join *Shekhar Sirโs FREE 4-Month Strategy Workshop* to plan your preparation, prioritise topics, and make the most of the next four months.
Saturday, 29 August | 5 PM | Live on Zoom
Reserve Your Free Seat:
https://lp.sleepyclasses.com/upsc-epfo-apfc-workshop?source=CRM
๐ฅฐ3โค1๐1
Sleepy Classes IAS
What major flaw in urban planning is directly blamed for shrinking open spaces and exhausting 4 to 5 hour daily commutes?
A city isn't truly developed when everyone owns a car.
It is developed when robust public infrastructure makes cars unnecessary.
โ๐ ๐ถ๐ด๐ฟ๐ฎ๐๐ถ๐ผ๐ป ๐๐ฟ๐ถ๐๐ฒ๐ฟ๐:
Rural migration is driven by livelihood gaps and natural disasters, with 54% of internal urban migrants originating from rural areas.
โ๐ฃ๐ผ๐น๐น๐๐๐ถ๐ผ๐ป & ๐๐ผ๐ป๐ด๐ฒ๐๐๐ถ๐ผ๐ป:
Rapid vehicle ownership growth, construction dust, and high PM2.5 levels (averaging 175 ยตg/mยณ in Delhi winters) severely degrade urban air quality.
โ๐ช๐ฎ๐๐ฒ๐ฟ ๐๐ฟ๐ถ๐๐ถ๐:
Around 600 million Indians face severe water stress as climate change and urbanization strain supply systems.
โ๐๐น๐ฎ๐๐ฒ๐ฑ ๐ฃ๐น๐ฎ๐ป๐ป๐ถ๐ป๐ด:
Car-centric urban design prioritizes vehicles over pedestrians and cyclists, shrinking open spaces and causing exhausting daily commutes of 4 to 5 hours.
โ๐ฃ๐ผ๐น๐ถ๐ฐ๐ ๐๐บ๐ฝ๐ฒ๐ฟ๐ฎ๐๐ถ๐๐ฒ๐:
Cities must shift focus toward reliable public transport, safe footpaths, accessible public spaces, and robust rural infrastructure to reduce distress migration.
It is developed when robust public infrastructure makes cars unnecessary.
โ๐ ๐ถ๐ด๐ฟ๐ฎ๐๐ถ๐ผ๐ป ๐๐ฟ๐ถ๐๐ฒ๐ฟ๐:
Rural migration is driven by livelihood gaps and natural disasters, with 54% of internal urban migrants originating from rural areas.
โ๐ฃ๐ผ๐น๐น๐๐๐ถ๐ผ๐ป & ๐๐ผ๐ป๐ด๐ฒ๐๐๐ถ๐ผ๐ป:
Rapid vehicle ownership growth, construction dust, and high PM2.5 levels (averaging 175 ยตg/mยณ in Delhi winters) severely degrade urban air quality.
โ๐ช๐ฎ๐๐ฒ๐ฟ ๐๐ฟ๐ถ๐๐ถ๐:
Around 600 million Indians face severe water stress as climate change and urbanization strain supply systems.
โ๐๐น๐ฎ๐๐ฒ๐ฑ ๐ฃ๐น๐ฎ๐ป๐ป๐ถ๐ป๐ด:
Car-centric urban design prioritizes vehicles over pedestrians and cyclists, shrinking open spaces and causing exhausting daily commutes of 4 to 5 hours.
โ๐ฃ๐ผ๐น๐ถ๐ฐ๐ ๐๐บ๐ฝ๐ฒ๐ฟ๐ฎ๐๐ถ๐๐ฒ๐:
Cities must shift focus toward reliable public transport, safe footpaths, accessible public spaces, and robust rural infrastructure to reduce distress migration.
โค6๐5
Solution to CSAT PYQ
Question 3: (d)
โThe central argument focuses on how an early and gradual transition minimizes disruption, making timing the crucial factor for green technology development.
โQuestion 4: (b) II only
โStatement I: Invalid.
The passage discusses path-dependence conceptually but never mentions specific nations like India or public finances. This extrapolates too far beyond the text.
โStatement II: Valid.
The author uses solar energy as the primary evidence to show that early efforts compound into lower costs. Assuming that an easier transition will occur if other technologies replicate this exact solar pattern is a reasonable inference based on the passage's logic.
Question 3: (d)
โThe central argument focuses on how an early and gradual transition minimizes disruption, making timing the crucial factor for green technology development.
โQuestion 4: (b) II only
โStatement I: Invalid.
The passage discusses path-dependence conceptually but never mentions specific nations like India or public finances. This extrapolates too far beyond the text.
โStatement II: Valid.
The author uses solar energy as the primary evidence to show that early efforts compound into lower costs. Assuming that an easier transition will occur if other technologies replicate this exact solar pattern is a reasonable inference based on the passage's logic.
๐4
With districts affected by Left-Wing Extremism (LWE) in India dropping to zero. What is the core strategy defining "Post-Naxal" governance?
Anonymous Quiz
7%
Permanent military deployment in former red zones
11%
Blanket financial amnesty for extremist funding networks
6%
Banning local political activity to prevent resurgence
77%
Comprehensive development, infrastructure & state presence
โค2๐2
Why have traditional flood defenses like river embankments often worsened flood risks in vulnerable regions like Bihar?
Anonymous Quiz
12%
โThey push transboundary river floods directly into neighboring states.
50%
They raise riverbeds by trapping sediment within the confined channel.
28%
They accelerate river velocity, causing rapid soil salinization in the upper basins.
9%
โโThey trigger micro-seismic events due to the weight of confined water.
๐3โค1
Dear @all
This Raksha Bandhan, letโs celebrate the bonds that matter and take Bas Ek Step Aur towards your goals.
Enjoy 30% OFF on all Sleepy Classes courses with code RAKHI30.
Valid till 29 August.
Happy Raksha Bandhan!
Access Free Trial:
https://sleepyclasses.com/?gad_source=CRM
This Raksha Bandhan, letโs celebrate the bonds that matter and take Bas Ek Step Aur towards your goals.
Enjoy 30% OFF on all Sleepy Classes courses with code RAKHI30.
Valid till 29 August.
Happy Raksha Bandhan!
Access Free Trial:
https://sleepyclasses.com/?gad_source=CRM
๐2โค1
Sleepy Classes IAS
With districts affected by Left-Wing Extremism (LWE) in India dropping to zero. What is the core strategy defining "Post-Naxal" governance?
โ๐ ๐ถ๐น๐ฒ๐๐๐ผ๐ป๐ฒ ๐ถ๐ป ๐๐ป๐๐ฒ๐ฟ๐ป๐ฎ๐น ๐ฆ๐ฒ๐ฐ๐๐ฟ๐ถ๐๐:
By March 31, 2026, the Union government declared India free from Left-Wing Extremism (LWE), with affected districts dropping to zero and fatalities declining significantly.
โ๐ฃ๐ผ๐๐-๐ก๐ฎ๐ ๐ฎ๐น ๐๐ผ๐๐ฒ๐ฟ๐ป๐ฎ๐ป๐ฐ๐ฒ:
Strategy has shifted from pure security to a comprehensive model of development, infrastructure, and establishing state presence through schools, roads, and hospitals.
โ๐ฅ๐ฒ๐ต๐ฎ๐ฏ๐ถ๐น๐ถ๐๐ฎ๐๐ถ๐ผ๐ป & ๐ฅ๐ฒ๐ถ๐ป๐๐ฒ๐ด๐ฟ๐ฎ๐๐ถ๐ผ๐ป:
Ensuring lasting peace requires robust rehabilitation programs for surrendered cadres including vocational training, housing, and psychological support.
โ๐๐ฒ๐บ๐ผ๐ฐ๐ฟ๐ฎ๐๐ถ๐ฐ ๐ฆ๐ฝ๐ฎ๐ฐ๐ฒ:
A strict distinction must be maintained between peaceful political dissent and violent extremism while accommodating political activity within constitutional limits.
โ๐๐ป๐ณ๐ผ๐ฟ๐บ๐ฎ๐๐ถ๐ผ๐ป & ๐๐ถ๐ป๐ฎ๐ป๐ฐ๐ถ๐ฎ๐น ๐๐ผ๐ป๐๐ฟ๐ผ๐น:
The post-LWE phase demands credible public communication to counter extremist narratives and strict actions against unlawful financial networks.
By March 31, 2026, the Union government declared India free from Left-Wing Extremism (LWE), with affected districts dropping to zero and fatalities declining significantly.
โ๐ฃ๐ผ๐๐-๐ก๐ฎ๐ ๐ฎ๐น ๐๐ผ๐๐ฒ๐ฟ๐ป๐ฎ๐ป๐ฐ๐ฒ:
Strategy has shifted from pure security to a comprehensive model of development, infrastructure, and establishing state presence through schools, roads, and hospitals.
โ๐ฅ๐ฒ๐ต๐ฎ๐ฏ๐ถ๐น๐ถ๐๐ฎ๐๐ถ๐ผ๐ป & ๐ฅ๐ฒ๐ถ๐ป๐๐ฒ๐ด๐ฟ๐ฎ๐๐ถ๐ผ๐ป:
Ensuring lasting peace requires robust rehabilitation programs for surrendered cadres including vocational training, housing, and psychological support.
โ๐๐ฒ๐บ๐ผ๐ฐ๐ฟ๐ฎ๐๐ถ๐ฐ ๐ฆ๐ฝ๐ฎ๐ฐ๐ฒ:
A strict distinction must be maintained between peaceful political dissent and violent extremism while accommodating political activity within constitutional limits.
โ๐๐ป๐ณ๐ผ๐ฟ๐บ๐ฎ๐๐ถ๐ผ๐ป & ๐๐ถ๐ป๐ฎ๐ป๐ฐ๐ถ๐ฎ๐น ๐๐ผ๐ป๐๐ฟ๐ผ๐น:
The post-LWE phase demands credible public communication to counter extremist narratives and strict actions against unlawful financial networks.
โค10๐3
Sleepy Classes IAS
Why have traditional flood defenses like river embankments often worsened flood risks in vulnerable regions like Bihar?
โ๐๐ฐ๐ฐ๐ฒ๐น๐ฒ๐ฟ๐ฎ๐๐ฒ๐ฑ ๐๐ถ๐บ๐ฎ๐น๐ฎ๐๐ฎ๐ป ๐ช๐ฎ๐ฟ๐บ๐ถ๐ป๐ด:
The Hindu Kush Himalaya region is warming faster than the global average, with projected temperature rises ranging from 1.5ยฐC to 5.5ยฐC.
โ๐ฃ๐ฟ๐ผ๐น๐ถ๐ณ๐ฒ๐ฟ๐ฎ๐๐ถ๐ผ๐ป ๐ผ๐ณ ๐๐๐ข๐๐:
Melting glaciers and permafrost degradation are multiplying glacial lakes, increasing the risk and frequency of catastrophic Glacial Lake Outburst Floods (GLOFs).
โ๐ฆ๐ต๐ถ๐ณ๐๐ถ๐ป๐ด ๐ ๐ผ๐ป๐๐ผ๐ผ๐ป ๐๐๐ป๐ฎ๐บ๐ถ๐ฐ๐:
Monsoons are drying on average while sharpening at the edges, leading to intense, short-duration downpours that overwhelm traditional water systems.
โ๐๐ถ๐ต๐ฎ๐ฟ'๐ ๐๐ ๐๐ฟ๐ฒ๐บ๐ฒ ๐ฉ๐๐น๐ป๐ฒ๐ฟ๐ฎ๐ฏ๐ถ๐น๐ถ๐๐:
Roughly 73% of Bihar's land lies within river floodplains, subjecting its population to recurring flood threats exacerbated by transboundary rivers and upstream activity.
โ๐ก๐ฒ๐ฒ๐ฑ ๐ณ๐ผ๐ฟ ๐๐ฑ๐ฎ๐ฝ๐๐ถ๐๐ฒ ๐๐ป๐ณ๐ฟ๐ฎ๐๐๐ฟ๐๐ฐ๐๐๐ฟ๐ฒ:
Traditional engineering like embankments has often worsened flood risks by raising riverbeds, necessitating a shift toward real-time monitoring, automated telemetry, and cross-border data sharing.
The Hindu Kush Himalaya region is warming faster than the global average, with projected temperature rises ranging from 1.5ยฐC to 5.5ยฐC.
โ๐ฃ๐ฟ๐ผ๐น๐ถ๐ณ๐ฒ๐ฟ๐ฎ๐๐ถ๐ผ๐ป ๐ผ๐ณ ๐๐๐ข๐๐:
Melting glaciers and permafrost degradation are multiplying glacial lakes, increasing the risk and frequency of catastrophic Glacial Lake Outburst Floods (GLOFs).
โ๐ฆ๐ต๐ถ๐ณ๐๐ถ๐ป๐ด ๐ ๐ผ๐ป๐๐ผ๐ผ๐ป ๐๐๐ป๐ฎ๐บ๐ถ๐ฐ๐:
Monsoons are drying on average while sharpening at the edges, leading to intense, short-duration downpours that overwhelm traditional water systems.
โ๐๐ถ๐ต๐ฎ๐ฟ'๐ ๐๐ ๐๐ฟ๐ฒ๐บ๐ฒ ๐ฉ๐๐น๐ป๐ฒ๐ฟ๐ฎ๐ฏ๐ถ๐น๐ถ๐๐:
Roughly 73% of Bihar's land lies within river floodplains, subjecting its population to recurring flood threats exacerbated by transboundary rivers and upstream activity.
โ๐ก๐ฒ๐ฒ๐ฑ ๐ณ๐ผ๐ฟ ๐๐ฑ๐ฎ๐ฝ๐๐ถ๐๐ฒ ๐๐ป๐ณ๐ฟ๐ฎ๐๐๐ฟ๐๐ฐ๐๐๐ฟ๐ฒ:
Traditional engineering like embankments has often worsened flood risks by raising riverbeds, necessitating a shift toward real-time monitoring, automated telemetry, and cross-border data sharing.
โค3๐2
Forwarded from Sociology Sleepy Classes
Guys, Iโve been reading this article on Wikipedia and I think this one single article can teach us a lot of Sociology in one go
๐1