Unintended Consequences

Megan McArdle has a brilliant post up that many bloggers have been linking to recently. Basically, McArdle argues that when engaging in public policy making in order to enact cultural change, anticipate that you will not be able to control the outcomes of your actions:

My only request is that people try to be a leeetle more humble about their ability to imagine the subtle results of big policy changes. The argument that gay marriage will not change the institution of marriage because you can't imagine it changing your personal reaction is pretty arrogant. It imagines, first of all, that your behavior is a guide for the behavior of everyone else in society, when in fact, as you may have noticed, all sorts of different people react to all sorts of different things in all sorts of different ways, which is why we have to have elections and stuff. And second, the unwavering belief that the only reason that marriage, always and everywhere, is a male-female institution (I exclude rare ritual behaviors), is just some sort of bizarre historical coincidence, and that you know better, needs examining. If you think you know why marriage is male-female, and why that's either outdated because of all the ways in which reproduction has lately changed, or was a bad reason to start with, then you are in a good place to advocate reform. If you think that marriage is just that way because our ancestors were all a bunch of repressed bastards with dark Freudian complexes that made them homophobic bigots, I'm a little leery of letting you muck around with it.

McArdle's essay is long, but definately a must-read.