There is a myth that Progressive humanitarians agitated for meat-packing regulations which now protect us from disease. The reality is that the big meat packers themselves wanted regulation to help crush the competition.
The resurgent claim that the modern economy was built on slavery is yet another attempt to attack capitalism while also claiming "we are all to blame" for slavery. The slave owners of old tried a very similar tactic.
It is troubling that after a decade of an economic expansion, the US government is still spending money as it does during and immediately following a recession. It is as if the economy is now in a state of permanent "stimulus."