To say there is nothing new under the sun is to say human nature does not change. Neither do the laws of Nature. However, human behavior does change as the will allows. When the human will is concordant with Natural Law, mankind tends to flourish. When it is not, there is misery and decay. "Unde Venisti" is about 21st Century America, about persons from many parts of society living under various economic conditions. To begin, the central characters, Mark and Callie Vincent, through the science of DNA, discover they have an hereditary match with two people named Marcus Vinicius and Callina Lygia who lived in Rome during the First Century, A.D. Even though it is twenty centuries later, Mark and Callie Vincent find themselves in a similar situation, at odds with a Republic loath to live by its own founding principles, and in which they, also, are unwilling to succumb to current mores. Inspiration for this story comes from "Quo Vadis," a novel about Rome at the time of Nero. "Unde Venisti" is a book with astonishing depth, vivid characterizations and momentous themes meant to gratify a thoughtful and intelligent reader.