> they all represent a net gain for Americans from the barren lands, primitive structures and meager output of 1776. Starting from scratch, America has amassed wealth totaling $90 trillion.
This is the original quote. The issue is with "starting from scratch." You're not starting from scratch if you obtained the land through genocide, assisted by free labor. You are starting with quite a lot. America did not start in 1776. European powers had been investing in the new world for hundreds of years at that point. The whole issue is calling the economy of America at 1776 "starting from scratch." It's ahistorical.