Our way of life is at stake, our grandchildren are at stake, the future of civilization is at stake.

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.

My plan to put Social Security in an ironclad lockbox has gotten a lot of attention recently, and I'm glad about that. But I'm afraid that it's overshadowing some vitally important proposals. For instance, I'll put Medicaid in a walk-in closet. I'll put the Community Reinvestment Act in a secured gym locker. I'll put NASA funding in a hermetically sealed Ziploc bag.

Remember that the problem is bigger than the car you drive or the types of lightbulbs in city hall. We need a fundamental shift away from dirty fossil fuels that spew carbon pollution. To make that happen, we need to put pressure on our leaders to take the bold actions necessary to move us off dirty sources of energy.

Consider a clock thermostat, and set it so that you're not using energy when you don't need it, when you're out of your house.

When our founders created America, it was in the age of the printing press, when individuals could freely join the conversation. And that robust, democratic dialogue more often than not lifted up the best available evidence and asserted what was more likely to be true than not.

We face a climate crisis now that is the most serious challenge our civilization has ever confronted. And the greatest country in the world [America] has to remain a part of this unprecedented global agreement to deal with it.