It's not a binary choice, but a spectrum. It depends on the scope and your own abilities - you can't turn a river around with a stick, but you can clean up your part of the lawn. Keep control over what you can control, and don't get too upset about what you can't - so with a little effort you change (or progress) a little part of the world.

Funnily enough I also know some happy people who adhere to none of these points.