What is probably the single most important?

It is difficult to determine a single most important person, as different individuals have had significant impacts on various aspects of history, society, and culture. However, one individual who is often considered among the most important figures in history is Jesus Christ.

Jesus Christ is the central figure of Christianity, the world's largest religion, with over 2.3 billion followers. He is believed by Christians to be the Son of God and the savior of humanity who came to Earth to sacrifice himself for the sins of mankind.

Jesus' teachings, as recorded in the New Testament of the Bible, have had a profound influence on Western civilization, shaping moral and ethical beliefs, social values, and the development of art, literature, and music. His message of love, compassion, forgiveness, and redemption continues to inspire billions of people around the world.

The life and teachings of Jesus have also served as a source of inspiration for countless individuals who have dedicated their lives to serving others, promoting social justice, and advocating for peace.

While there are differing interpretations of Jesus' significance among different religious and cultural traditions, his impact on the world is undeniable. Jesus Christ continues to be a figure of great importance and influence for billions of people worldwide.