As well as an evangelist and missionary, Henry Drummond was a naturalist. He studied
physical and mathematical science before dedicating himself fully to Christian ministry.
In 1877, he became a lecturer on natural science at the Free Church College. He used
his position to share his faith as often as he could. While he studied in preparation for
his lectures, Drummond wrote Natural Law in the Spiritual World, in which
he explores how the world of religion and spirituality relates to the physical world. He
argued that the disconnect between the spiritual and the physical was entirely illusory
and that faith was by no means in conflict with science. Written just a few decades after
Darwin’s landmark On the Origin of Species, Drummond’s reconciliation of the
theory of evolution with God’s purposes ranks among the most important and influential
books concerning Christian faith and scientific progress.