The US, like any other nation, has done some good stuff and some bad stuff. I think you're not being very objective in this. Yes, when the US got involved in the Wars it was certainly a great help for the Allies, but "stood for what's right"? It became involved in the First World War in 1917, three years after it began, and on the back of German submarine warfare and flirtation with Mexico. It got involved in the Second World War in 1941, after most of Europe had fallen to Germany, and its involvement was the direct result of a Japanese attack. And you talk about the minimum wage, and age minimums, and unions, but you forget that those could only come about because they weren't there in the first place. Which is sort of my point. Ask a black woman whether or not the not-so-distant American past was so great.
You're falling victim to the very thing you disparage in the Tea Party, a very romantic view of your country's past. Eboue gave a few examples of why things weren't so hunky dory 60 years ago, and there are many more.