It is the job of the Department of Defense to identify military threats, both short and long term then advise proper actions and force levels needed to Congress and the President.
Wars and strife are usually caused by a scarcity of resources or greed. Nothing that the defense community can currently identify threatens the availability of basic necessities as much as global climate change as a report written in 2015 concludes.
In the report, interestingly enough, then US Joint Forces commander General Mattis agreed that climate change is a threat. Yes, the current Secretary of Defense Mattis reportedly said:
“climate change is a challenge that requires a broader, whole-of government response. If confirmed, I will ensure that the Department of Defense plays its appropriate role within such a response by addressing national security aspects…”
This puts Mattis at considerable odds with President Trump who has concluded that global climate change is a hoax by Communist China to undermine US economic power. The same president that currently is dismantling the environmental arm of the United States by gutting NASA, the EPA and NOAA.
What will Trump do when this outspoken General is asked by Congress or others about causes of inevitable flair ups in nations already suffering from the ill effects of climate change? What will he say when the refugees of those catastrophes show up at our door as refugees?
Let us hope that Mattis remembers his words from 2015.