Henry Drummond was a Scottish evangelist, lecturer, and writer, best known for his work in Christian apologetics and his popular book The Greatest Thing in the World (1890), which explores the nature of love based on 1 Corinthians 13. He was born in Stirling, Scotland, and studied science and theology at the University of Edinburgh. A skilled communicator, Drummond combined scientific knowledge with Christian faith, aiming to harmonize evolution with biblical teachings. He also worked as a missionary in Africa and lectured widely, influencing many with his thoughtful and compassionate approach to Christianity