Henry Kissinger, former Secretary of State and National Security Adviser to Presidents Nixon and Ford, passed away at the age of 100. He was known for his "realist" approach to foreign affairs, which prioritized U.S. interests over any potential atrocity. Historian Doug Brinkley said Kissinger “invented the modern concept of realism” in foreign affairs, but his actions had a devastating impact on many countries. His legacy will continue to be debated for years to come.