Those who lead any substantial organization—military, political, religious or corporate —are subject to pressures that impact critical decisions.
Three examples:
On April Fool's Day, 1993, Louis V. Gerstner, Jr., became the CEO and Board Chair of IBM. During his leadership over ten years, he turned the company's fortunes around by changing a culture he later described as "inbred and ingrown."
In August 1945, U.S. President Harry Truman had to decide whether to drop the atom bomb on Japan. Meanwhile, the planning for Operation Downfall—the invasion of Japan—was well underway, with causalities on both sides expected to be horrific.
The Papacy of the Roman Catholic Church leads over a billion Catholics, worldwide. Since becoming the Pope in March 2013, Pope Francis has faced a mounting scandal involving pedophile priests. His effectiveness to date in dealing with it is in dispute.