Question: a man who has changed the world?
Answer: Jesus of Nazareth (circa 5 BCE – 30 CE) Spiritual Teacher, central figure of Christianity.
Thomas Jefferson (1743 – 1826) American President 1801 – 1809. ... 
Mikhail Gorbachev. ... 
Lord Buddha (circa 563 BCE – 483 BCE) Spiritual teacher and founder of Buddhism.