the earth goes through many cycles. minutes, hours, days, weeks, months, years, seasons. some of the cycles are actually longer. one cycle that exists relates to our sun. every so often it produces nova events that rearrange the earth via magnetic pol shift. it seems that very few survive this event... but it is survival if you live in the right place i guess.  most people were pissing their pants 5k years ago but there were also remnants from the old world that had knowledge of architecture
United States