Stanley McChrystal is a retired four-star general in the United States Army known for his leadership in the Afghanistan War. He served as the commander of the International Security Assistance Force and was instrumental in developing counterinsurgency strategies that emphasized collaboration with local populations. After retiring in 2010, McChrystal became a public speaker and author, sharing insights on leadership and teamwork. He co-founded the McChrystal Group, a consulting firm that helps organizations improve their performance through innovative leadership practices and adaptive strategies.