If all people tried to accomplish something, how much could we make the evolution of human society/economy faster?... Would we be colonizing other planets in 50 years... Worth a try.
If aliens contacted people and wanted to work together, would human society collapse? (ok, it's more of a thought, but it's the future)
If men had a choice to really understand women for one month (relate to the problems somehow mentally), how many guys would actually say that they want to know? Mhhh... If there only was an answer.