Maybe we should turn this into a straight up red vs. blue vote, with the losing side getting exterminated. You know, just wipe out millions of people based on arbitrary color preference.
Everyone on earth takes a private vote by pressing a red or blue button. If more than 50% of people press the blue button, everyone survives. If less than 50% of people press the blue button, only people who pressed the red button survive. Which button would you press? BE HONEST.