To carry out their goal to leave the world a better place than they found it, they should carry out a suicide pact and once they are gone the world will be a better place!

I do think there are too many people, perhaps.

The unbelievable irony is the exact same people arguing for the environment and too many people, want to simultaneously save all the starving and poor using resources stolen from the successful. They could have their way if they let nature take its course.