1. Histiography
2. Ideologies
3. Sources
Haha, I love this question. Ok, I’ve got this. I feel like depressed people, born with it or had obtained it, really feel like they’ve been through the ringer. They feel like they’ve been beat down harder than most can fathom. They’ve hit a rock bottom that they often thought there was no escape from. However, this seems to make them more tolerant when they resurface from their all time low. They let things roll off them a lot easier than before to avoid falling back into their old routine. They want to avoid ever hitting another rock bottom, so they seemingly become more patient and more relaxed about many situations. I, myself, agree that the depressed people of the world really are mentally stronger than people who’ve never experienced such a hard rock bottom. Sure, everyone has a gloomy day once in awhile. For the depressed, everyday is the worst day Of their life. It takes a real strong willed person to work past a constant stream of never ending dark days.
Agricultural development led early societies to settle. Settlements required growing food and a lasting source of water. That's why these early civilizations were born around rivers. The proximity of rivers facilitated access to fertile soil and, logically, to water.
Once a civilization has a stable source of food it can start growing surplus of it, which creates the possibility of trade. That is, stable food production is a base for the complexification of a society that can lead to the creation of other jobs, like the merchant.
It also enables a society to complexify its social structures, to build cities, to develop religion and culture which creates more jobs.
The main reason why the Mesopotamians were fortunate to live in the fertile crescent is because this was a place of unparalleled soil fertility--meaning that they had the best chance of growing the most crops.
Africa and Asia were able to gain strength after WWII were because after the war the colonial powers of Biritan and France, and the US spoke out about colonialism and some other European nations saw that they had to give up their colonial empires.
