Humanity

Introduction
Humanity is one of the oldest and most diverse in the universe, ruling as the Milky Way's predominate civilization on no less than four occasions.

As such Humanity is an overarching term used for all the branches of species, who over the course of the last one-million years has diversified into numerous subspecies or inbreed with alien races.

Currently out of the accepted fourteen branches of Humanity, only five are alive in the contemporary era. Through biological evolution and diversifcation, these are the Colonials, Humans and Hiigarans. Through mechanical construction and technological development, this also includes the Asurans and Cylons. As contact was lost with the ancient Ori and a large portion of history between the Lanteans and the Primus Humans has been destroyed over time, the chance that other branches could exist are a possibility.

History
While the history of Humanity covers over one-million years, it can easily be dissected into eras based on which civilization of Humanity was considered most active during that period.

Currently there are nine accepted eras:


 * Alteran Era


 * Ancient Era


 * Lantean Era


 * Alliance Era


 * Forerunner Era


 * First Civilization Era


 * Hiigaran Era


 * Kobol Era


 * Modern Era

Biology
Though Humanity is over one-million years old, most of its biology has largely remained the same.

Humanity Evolutionary Tree
The evolutionary process of Humanity is the progression leading up to the appearance of Humans, Colonials and Hiigarans, and as an offshoot due to technological advancements, Cylons and Asurans. While it began with the last common ancestor of all life, the topic usually covers only the evolutionary history from the ancient Alterans. The study of Humanity's evolution involved many scientific disciplines, including physical anthropology, primatology, archaeology, linguistics, evolutionary psychology, embryology and genetics.