"May be there's less violence, but the amount of suffering has skyrocketed over the years. A more than significant amount of people are dependent on tranquilizers and anti-depressants to make their life bearable, because for them it has become mundane and meaningless without."

I don't think this is very accurate. People get hooked on painkillers usually because they had some sort of accident and need them for pain...and since opiates are extremely addictive, continue to take them after they no longer need them.

"also these numbers don't show how much exploitation and environmental damage our alleged 'prosperity' causes in other parts of the world."

You can't blame us for countries that decide to have no rules and ruin their environment. When you compare the environment of the US to pretty much anywhere in the world, it's one of the cleanest (if not the cleanest).

..and 'exploitation'? We built the middle class of China. Before we started going overseas to build factories, the majority of people in China were in complete and utter poverty.

Hardly what I call exploitation.