““Vast populations in parasitic hot zones are without hospitals, doctors, drugs, or surgical equipment. Meanwhile, often directed at the very same underserved regions, wealthy countries are throwing billions of dollars into campaigns aimed at containing wars ignited by ethnic hatred and religious intolerance, not to mention dealing with the refugee crises and other tragedies this violence has spawned. By investing more in health care up front, Thornhill’s model predicts, Western countries might not have to spend so much on warfare later—and may ultimately reduce human suffering far more effectively.””