An idea that I think would be very helpful to people - and relatively simple to grasp - is the idea of tribalism, and how much it really motivates us, even to this day. Not just that politics is the mindkiller, but why. I think if more people were able to take a step back every once in a while and think, "Hey, I don't even care about or like this idea...why am I defending it? Because it's an idea that I think a group I consider myself a part of holds, and by attacking one idea of my tribe, it seems like you're attacking every idea of my tribe? Does this make sense?" then the world would be a much more friendly place, at least.