According to the so-called "Cyclical Death-Wish Theory," why did the Classic Maya abandon their cities?
1) The "Putun" Maya, or "Tom Selleck" people invaded in repeated cycles.
2) They feared the end of the 9th and beginning of the 10th baktun ( .0) meant the end of the world.
3) Cycles of warfare tied to astronomical cycles spiraled out of control.
4) A recurring cycle of hurricanes and earthquakes destroyed the cities.