Charles Hartshorne was an American philosopher and theologian, best known for his work in the field of process philosophy. Born in 1897, he contributed significantly to the development of process theology, which emphasizes the dynamic and relational nature of God and the universe. Hartshorne's ideas were influenced by the works of Alfred North Whitehead, with whom he collaborated and shared philosophical insights. Hartshorne's writings explored the nature of existence, the problem of evil, and the relationship between God and the world. He argued that God is not an unchanging being but rather a participant in the ongoing process of creation. His influential works include "The Divine Relativity" and "Creative Synthesis."