Most people think that the 1st Amendment guarantees free speech. But the philosopher John Stuart Mill argued that free speech requires more than just the absence of legal strictures. The “tyranny of opinion” of the majority has the same effect as censorship enforced by law. When everyone lives…

Earlier this month Stephen Hawking declared: “We are close to the tipping point where global warming becomes irreversible. Trump’s action [withdrawing from the Paris climate accord] could push the Earth over the brink, to become like Venus, with a temperature of two hundred and fifty degrees…