In his book Against Democracy (2017), Jason Brennan presents a formidable amount of empirical evidence to the effect that the more someone is involved in politics, the worse he or she becomes as a person.
- The more you are involved in political debate (especially as the representative of a group or ideology), the less likely you are to reach reasonable conclusions. Participation increases people’s tendency to ignore facts that don’t support their position, to argue in manipulative and deceptive ways, to adopt extreme views, and in general it makes people more biased and less reasonable.
- The more active you are in politics, the less likely you are to talk with people whose views run contrary to your own. In fact, you may reach the point where you are unable even to imagine a point of view other than your own. As a result, the more active you are in politics, the less good you will be at doing what politicians are supposed to do: see enough sides of an issue to craft and sell a compromise.