<span>Agriculture and domestication of animals. Both allowed for an increase in food while causing people to remain in one location. That allowed specialization of tasks and created the need for record keeping and government.</span>
People could start using robots to do work around their house and provide companionship starting in 2030. We could live in a Matrix-like virtual world by 2045. People could also become Cyborgs by 2045. People could control their home settings using artificial intelligence by 2040 as well.
They had to reinvent their economy because General Shermans tactic of total war. when he did total war, he marched from the north all the way to Atlanta, Georgia and destroyed anything that couldn't be used as food or supplies. so they had to reinvent their economy because the south was totally destroyed