The practice of planting, tending, and harvesting crops most likely led to a "surplus of food", which in turn led to the diversification of labor and advancement of society, since people now could focus on things other than farming.
When Upton Sinclair said, “I aimed at the public's heart, and by accident I hit it in the stomach,” he likely meant that his novel The Jungle made people more outraged about the meat they were eating than the injustices facing the typical meat industry employee.
Here are afew things, Under water warfare sub, the chronometer, and the toilet.
