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 describes how, in evolutionary biology, a group of organisms share a most recent common ancestor.There is evidence of common descent that all life on Earth is descended from the last universal ancestor.Common ancestry between organisms of different species arises during speciation, in which new species are established from a single ancestral population.ommon descent describes how, in evolutionary biology, a group of organisms share a most recent common ancestor.