He asserts that nuclear winter research changed geopolitics by demonstrating that nuclear warfare results in universal extinction rather than winners.

“Old Timers would that came out and it changed geopolitics people realizing that not only are there no winners in a nuclear exchange and maybe all of life on Earth would be rendered extinct”

He maintains that a nuclear conflict would lead to global catastrophe and widespread starvation due to atmospheric smoke blocking sunlight.

“we think if there were a war between NATO the U.S Russia probably 5 billion people would die and the reason for that is that with no sunlight the temperatures fall”