kev,it sounds like you have checked out Teotihuacan.Even some of the earlier Mayan stuff at Palenque,Tikal and Copan is fairly amazing considering the tools and resources available at the time.
As I look around from my perspective I see a damaged and perhaps dying world,largely caused by people with strong beliefs (be they religious ,capitalistic,moralistic or whatever) and realize that perhaps we as individuals need to be a little more open to change, sensitive to the needs of others and the planet and less moulded in our beliefs .
cheers scott