The Precursors
Before we’re introduced to any of the playable characters, the timeline of Assasin’s Creed begins just before the creation of mankind. In this timeline, the “First Civilization” on Earth was comprised of beings referred to as “The Precursors” which were humanoid lifeforms that were more akin to Greek Gods and Goddesses than they were to humans. These Precursors possessed technology that far surpassed what we have access to today.
In fact, one of their most notable technological advancements was the creation of humans. It is hinted that humans were created through the genetic alteration of a pre-existing species on the planet. The Precursors created humans as a subservient race that revered them as gods and performed tasks obediently.
As a way to control and manipulate the humans, the Precursors also developed highly advanced technological instruments known as the “Pieces of Eden” which posses the ability to alter consciousness. In other words, the Pieces of Eden made mind-control possible and some possessed other unique abilities such as divining the future and more. However, this didn’t last forever due to the intervention of Adam and Eve.