Quote from piezoe:
Agreed he only tried the easy parts. But full-on laissez faire has been in tried at other times in our history and it didn't work, except for the few of course. I think capitalism works best for everyone when you have good regulation. In fact, I think without good regulation you end up with what the U.S. is mired in now. We have had some bad regulation in recent years, mostly originating with special interests.
Late 1800s up to around WW1 - laissez faire worked great. Econ metrics like we've never had before without the debt/spending excesses. No Fed and no income tax needed. We had "deflation" and it was a good thing.
1921 - Averted an earlier version of the Great Depression. Fed did nothing (rates were left around 7%) and the gov't actually cut spending sharply. We were out of the woods within a year or two.
These are just two examples from the pre-Keynesian past. The textbooks do their best to cherry pick, spin history and make it look like Keynesian ideas worked or "would've worked if we only spent more." That should have been discredited decades ago. You only have to look at the current state of the US and most of the Western world to see what it leads to.