The collapse of the Mayan civilization has long been a mystery, but in 2012 archaeological researchers at Arizona State University came up with a solution that makes sense. By studying the environmental conditions that existed shortly before the Mayan collapse, they were able to support a theory first proposed by historian Jared Diamond in 2005. He theorized that the cause was extensive deforestation in the lands occupied by the Maya, which led to a change in the land's absorption of solar radiation, which led in turn to a lack of rainfall. In the resulting drought, the agricultural foundation of the Mayan civilization failed.
Assuming the statement above is true, what was likely the direct result of the failure of Mayan agriculture, and why did it result in the total collapse of the civilization?