How much is enough?

So starting from the fact that we're all aware their is big trouble on the horizon for the world.

How much of what we do is enough? What do you have to do in order to be satisfied you will be leaving a world set to support your children through their lifetimes? When should you stop working for a better world and relax with the people you love (if your work doesn't include them)?

I don't know, but looking at the way things are going, I would say we could still take it up a notch!