Aside from the moral issue about whether or not trying to control someone else's behavior is right or wrong, the practical problem with trying to control others is that whenever you blame, bribe, complain, criticize, punish, or threaten anyone, they'll resist. They'll argue. They'll fight. In fact, they'll cajole, ignore, cheat, sneak around behind your back, or do any one of a zillion things they can think of to get you to back off.

It's simply human nature. You're genetically wired to resist being coerced into doing something you don't want to do. It may be more pronounced in one person than another, but unless you recognize what you're doing and learn how to get what you need in a relationship without trying to control other people, every relationship you have will disintegrate into a power struggle that will make everyone just plain miserable.