A very chilling read on this topic is the eerily prescient book "Parable of the Sower" by Octavia Butler. It was published in 1993 and is "Set in the 2020s where society has largely collapsed due to climate change, growing wealth inequality, and corporate greed." The president of what is left of the United States is a former entertainer turned populist politician. Butler nailed this one and showed us what the result of four more years of Trump might bring us to.