"We've sent out one or two little messages, but we certainly aren't investing billions of dollars shouting out into the cosmos saying, "Hey, we are here. Come say hi.""

"There is so much more uncertainty and volatility in a world that is moving fast with big countries that are more at odds with each other and with fewer rules of the road that leaders, companies, and societies are adhering to."

You can’t control external threats, but you can manage how you prepare and respond to the risk.

The 1815 eruption of Mount Tambora is one of the reasons why Bryan Walsh sees supervolcanoes as the” single, biggest threat to the human race.”