Good things often get taken too far. They can take on a life of their own through self-perpetuation, get over-zealously applied, or become hijacked. This often turns good things into mixed things and sometimes even corrupts them into bad things. Here are four interesting examples: (1) Zoning laws in the U.S. helped solve problems (like keeping pollution-spewing factories away from people’s homes and helping keep cities pleasant). Later, they got used in a way that increased ...