Best Answer: It existed for the same reason it has existed for the entirety of human history. It's more economically advantageous to simply force people to work ...
The remarkable discovery was made by 12-year-old BridgeAnne dâAvignon, of Salinas, California, who created a ground-breaking family tree that connected 42 of 43 U.S. presidents to one common, and rather unexpected, ancestor: King John of England.he only former commander-in-chief not linked to King John is the eighth president, Martin Van Buren, who had Dutch roots. The teen also found out that she is the 18th cousin of President Obama.
Common descent is the scientific theory that all living organisms on Earth descended from a common ancestor. Although evolution had been suggested as far back as Ancient Greece; the first proponent of common descent appears to have been Erasmus Darwin, the grandfather of Charles Darwin.