It is interesting that the climate in North American was changing about the same time it was changing in Central America. Those who study the Mayan collapse often attribute their downfall to long periods of drought. Yet during this same period there were areas farther north receiving excessive rainfall.
Today we see patterns like El Nino that seem to run in cycles, but those cycle patterns are relatively short - a few years. They don't seem to run for decades at a time. It makes for an interesting mystery.
Because most articles written today are pushing one agenda or another it's hard to separate fact from fiction. And it is a bad idea to simply try to piece the puzzle together by simply gathering facts and follow where they lead. One college professor was trying to do just that. Simply assemble facts as they were uncovered. He received death threats, had to have police protection and moved his family out of town. The poor guy hadn't made any statements one way or another, hadn't published any papers, nothing. It just became known he was trying to gather facts.
I assume the people wanting to kill him were wanting to make a sacrifice to the sun god.