This is by far the most serious crisis civilisation has ever faced.

We have to abandon the conceit that isolated personal actions are going to solve this crisis. Our policies have to shift.

We can believe in the future and work to achieve it and preserve it, or we can whirl blindly on, behaving as if one day there will be no children to inherit our legacy. The choice is ours; the earth is in balance.

For me, the most serious problem is how America became so vulnerable to the assertion of blatant falsehoods that drive policy and are not corrected by the so-called immune system of democracy, a free press and a free democratic discourse.

I smoked pot in college and in the Army.

American democracy is in grave danger from the changes in the environment in which ideas either live and spread or wither and die.

And nobody is talking about taking guns away from hunters or sportsmen or banning all guns. Nobody is talking about that.