For every Andrew Jackson there's a Theodore Roosevelt, for every Bufallo Bill Cody there's an Aldo Leopold or a John Muir. You're choosing to focus on the negative. We shouldn't have done those things and neither should future people. But only you can change it. How many trees have you planted? Do you support wildlife conservation funds? Do you support Native American charitable causes? Do you grow a garden? If you see trash, do you pick it up?