The Average Cross-over Age From Leftism to Conservatism. On the Brexit vote:
As a common political truism says, in various guises attributed to various well-known figures:
If you’re not a socialist before you’re twenty-five, you have no heart; if you are a socialist after twenty-five, you have no head.
If you aren’t a liberal when you’re young, you have no heart, but if you aren’t a middle-aged conservative, you have no head.
Currently in the UK the average cross-over age seems to be 34: