This document profiles several influential historical figures, including: - Constantine the Great, who legalized Christianity in the Roman Empire. - James Watt, who improved the efficiency of the steam engine. - Michael Faraday, who discovered electromagnetic induction and contributed greatly to the fields of electromagnetism and electrochemistry. - James Clerk Maxwell, whose equations unified electricity, magnetism, and light and helped enable wireless communication and technologies like TV. - Martin Luther, whose writings helped launch the Protestant Reformation and divide Christianity into various sects.