And young people become old, gain more life experience and knowledge and change their views.

Too bad for all the people that suffer in the meantime. Said one smart person:

... this long run is a misleading guide to current affairs. In the long run we are all dead. Economists [and everyone else] set themselves too easy, too useless a task, if in tempestuous seasons they can only tell us, that when the storm is long past, the ocean is flat again.