Schweitzer was an Alsatian theologian, musician, philosopher, and physician. Determined to become a medical missionary, he established a hospital in Gabon, Africa, in 1913 and later expanded it to include a leper colony. He was awarded the Nobel Peace Prize in 1952 for his medical and humanitarian work and for his “reverence for life” concept of universal ethics, which emphasizes respect for the lives of all beings. An organist to boot, he interpreted the music of what composer? Discuss