The Bulletin of the Atomic Scientists updated their Doomsday Clock today, and it is looking as bad as it ever has for Planet Earth:

To: Leaders and citizens of the world
Re: Closer than ever: It is 100 seconds to midnight
Date: January 23, 2020

Humanity continues to face two simultaneous existential dangers—nuclear war and climate change—that are compounded by a threat multiplier, cyber-enabled information warfare, that undercuts society’s ability to respond. The international security situation is dire, not just because these threats exist, but because world leaders have allowed the international political infrastructure for managing them to erode.

Also:

In the past year, some countries have taken action to combat climate change, but others—including the United States, which formalized its withdrawal from the Paris Agreement, and Brazil, which dismantled policies that had protected the Amazon rainforest—have taken major steps backward.

“The Doomsday Book” by Marshall Brain is designed to help humanity step back from the precipice and solve the many interlocking doomsday scenarios that humanity faces today.