I got my college degree in 71. I was a social studies major with a first endorsement in Econonomics and a second in political science with a minor in U. S. history. Keynesian Economics was the standard theory taught back then. This was the theory Roosevelt used to pull us out of the Great Depression. Before that Pres. Hoover and most others of his time believed in the trickle down theory. They believed by priming the pump from the top the rich would spend it on their businesses and thereby employ more workers whereas the Keynesian theory which was what Roosevelt followed believe in putting the money in the hands of the poor and they would spend it for goods and services and create a demand which would jump start the economy. The poor spend everything they have where the rich don't always spend the tax cuts or govt. hand outs. Under Reagan, he reverted back to the time before Keynes by following (I think I have the name right) another economist, Milton Frieden who believed in tax cuts for the rich.
It seems we never learn through history. I think history should be more important in todays curriculm so we don't keep repeating the same mistakes over and over.