Only significant if you ignore 1933 to 1978. Otherwise it's mediocre. If you're a working class family it's dismal. You achieved no increase in wealth between 1980 and 2000. And then lost ground in real terms since 2000.
So we just need encourage totalitarian empire-madness in Asia and Yurp and it'll all be fine. Because that's what's behind '33 to '78.
You do know that between 1933 and 1978 there were a couple of incidents that ended up influencing the world's economy more than basic economic models, don't you?
I mean, I'm sure we can agree that an event like WW2 alone, with the shift from peace-time to war-time economy experienced by the leading economies of the world, does influence things a bit more than the theoretical effect of some economic systems.
People who back up Keynes, will say it was the wartime investment that drove the economy.
Neoliberal will say the war pretty much destroyed every economy except the American, leaving America relatively rich, which is why that period looked so good for them. Had there been no war, everybody would have been better off.