Max Tegmark

It opens up entirely new possibilities for things that you can do—where you can go into battle or do a terrorist attack with zero risk to yourself, and you can also do it anonymously, because if some drones show up and start killing people somewhere you have no idea who sent them. [...] One of the main factors that limits wars today is that people have skin in the game. [...] Politicians don’t want to see body bags coming home, and even a lot of terrorists don’t want to get killed. (source)