[fsloth]

Actually America industrialized quite early. The north was business and industry savvy, while the south focused on slavery. Slavery was not important for national economy - otherwise there would have been no civil war in 1860:s. Instead north was doing just fine economically without slavery, while south wanted to hold to most of it's capital (slaves).

I agree that the expansion to west was facilitated by forced migration of native americans from their homelands in a process that was borderline genocidal.

The fun part is about american industrialization - quite lot of it was based on directly stealing the IP of european industrialists (i.e not respecting their patents). This is quite fun in the sense how vocal US is now in upkeeping IP laws.