All of the above can only mean... Religious people set out to find god but found aliens which were brought back and placed robots around the earth which placed nano bots in every person's head that was a part of the government. This turned the people to zombies and since they were dead they started spreading diseases while some people stayed alive with the nanobots which made them go crazy and blow up the entire earth with the bombs they had while causing natural disasters from the radiation and explosions. Due to the radiation, crops could not grow and the ph levels of water became way too high causing any source of water too acidic for any life. A solar flare also happened during this time hitting earth and causing electricity to fail. Making all future life impossible on earth.