Due to the Articles of Confederation, States could override what Congress had established and create their own laws which caused division between the states and caused many issues on currency and of other sorts of important matters. Thus, enabling no authority of control over the power of the differentiating states.
Answer:
His friends destroyed his art work after his death.
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.