Adam Smith pointed out that there were three things that make us more prosperous, in a general sort of way: freedom to pursue our own self-interest; specialization, which he called division of labor; and freedom of trade.
Infant mortality and life expectancy are reasonable indicators of general well-being in a society.
The Tea Party has definitely increased political involvement, not only among Tea Party members but among people who oppose the Tea Party members. It's been a general stimulus.
The car provided Americans with an enviable standard of living. You could not get a steady job with high wages and health and retirement benefits working on the General Livestock Corporation assembly line putting udders on cows.