[guth]

Same thing with matter/antimatter, and "white flight" demographics. Also, the more energy-efficient we make our technology, the more energy we will use in total.

Any tension not in a buffered solution will collapse to dominance by one-side.

This one, though: > Why can’t everyone just agree to a family-friendly, 40-hour workweek?

You can choose to opt-out of the rat race, and still be happy.

Some other too. Yes, to a first approximation, there are no easy problems (or free lunches), so only attack problems you'd love to solve.