https://www.getwisdom.com/login/?redirect_to=https%3A%2F%2Fwww.getwisdom.com%2Flogin%2F%3Fredirect_to%3Dhttps%253A%252F%252Fwww.getwisdom.com%252Fquestion%252Ffor-all-the-talk-of-friction-stemming-from-differences-in-physical-features-and-appearances-the-difference-in-intellectual-ability-among-individuals-is-one-of-the-most-striking-and-important-to-outc%252F