Answer: Isaac Newton was an English philosopher, mathematician, and physicist. His book, Principia Mathematica, combined Kepler’s laws of planetary motion, Galileo’s laws of inertia, and his law of universal gravitation. Newton believed that faith and science could coexist. He believed that God created the universe and the universe would work according to these scientific laws. Man could then discover these laws and use them for their own good.Sir Isaac Newton was an English physicist who lived during the the 17th century. He is famous for developing a theory that applies to planetary movement and for developing theories that had to do with gravity. He is basically the "father of calculus."