if you could reverse time what would you change?

If I could go back in time, I would make sure we never invaded Iraq. I'd bring back news articles and facts to show to President Bush and prove to him that the cost in American lives would not be worth it. I'd offer him proof that there were no Weapons of Mass Destruction. America would be so much better right now, if we hadn't invaded Iraq and lost thousands of lives and billions of dollars.

if i could change one thing that happened in the past-- i would have changed the begining of civilization.. thereby we will be just another species of animals.. that way the world would have been a better...or ?