人类

“我们用自己的形象创造了你们,我们创造你们去生存。”

―密涅瓦的投影，1499^[来源]

人类是当前在地球上生命处于主导地位的一种两足哺乳动物。由于伊苏需要创造一种大量的、强壮且驯服的劳动力，人类得以进化，而事实上人类正是一种强制进化的产物。正是根据先行者的需要，使用一种之前存在的灵长类物种制造，将种属分为亚种如用尼安德塔人来制造战争军队或使用智人作为工人。

人类与他们的“神”之间经过长时间的和平之后，人类起义然后战争爆发。紧接着是一场全球性的灾难，将两个物种带到了灭绝的边缘，他们被迫以比以前更平等的方式合作。在这场灾难后的100年里，人类的创造者们灭绝了，除了一些基因进入人类的基因库，他们只留下了些许散落的遗迹和文物。而现在，智人这些先行者所留下的孤儿逐渐同化吸收其他的人种继续蓬勃发展，并最终散布在全球范围内。

历史

包括许多人种在内如智人或尼安德塔人的人种，都是由第一文明在伊苏纪元1923年到2296年时期(c.75,383 - 75,010 BCE)^[1]人工创造以作为顺从的仆人、或工人和士兵，并且他们将伊苏视为神。然而，随着时间的推移，人类很快开始憎恨“神”的统治，而主人奴仆之间的和平时代也被战争所代替。

由人类和伊述杂交所生的亚当和夏娃偷走一个伊甸苹果作为导火索所引发的战争蒙蔽了人类与伊述双方的双眼，使他们没有看到在地球外正在发生的事情，因此他们并没有预见到即将来临的巨大灾难，即几乎可以毁灭两个物种的太阳耀斑，直到一切为时太晚。^[2]

人类和他们的“神”濒临灭绝，他们聚到一起进行灾后重建。他们在之后将成为罗马的地方至少建立了三个神殿来警示人类的后代。人类并没像伊述因为人口过少而接近完全灭绝，以他们庞大的的数量成功地幸存了下来。

As the years passed, the First Civilization inevitably became extinct, though humankind continued to revere them as gods in their various Pagan religions. It was not until the rise of three monotheistic religions of Judaism, Christianity, and Islam, which soon spread across the globe, that humanity began to forget their "gods", though there were those who continued to worship them, and those who came to see the First Civilization for what they really were.^[2] Foremost among these groups were the Templars and the Assassins.

By the 12th century, both Orders firmly believed that the gods of old did not truly exist, and realized that many so-called "miracles" attributed to them had actually been the workings of the Pieces of Eden. However, upon the acquisition of one such Piece – an Apple of Eden – by the Assassin Altaïr Ibn-La'Ahad in 1191, humanity at last became aware of the true nature of the humanity's pagan gods.^[3]

Centuries later, in 1499, another Assassin, Ezio Auditore da Firenze, located and entered one of the Vaults beneath Rome, meeting with the holographic representation of the "goddess" Minerva.

Inside, Minerva warned Ezio of the catastrophe her species had suffered, and that it would happen to humanity once again. However, even this did not ensure humanity's knowledge of the true nature of the gods of old, and by the early 21st century, the Assassins once again knew very little of the true nature of the First Civilization.

However, this changed in 2012, when the Assassin Desmond Miles used the Animus, a device derived from the First Civilization technology, to relive the genetic memories of his ancestor Ezio Auditore, and witnessed the warning of the future cataclysmic event.^[2]

特点

“我们没有使他们变得明智。但现在他们是我们最后、有缺陷的希望。你代表他们。你有可能去理解 [...]几百年间我可说而你们仍然不知道我们。你们只有五感，而我们有第六感。这便是我们与你们的区别。”

―朱诺对人类。^[来源]

Des Hideout 1 — 戴斯蒙德迈尔斯和露西斯提尔曼，两个二十一世纪早期的人类。

The human race was developed in the image of their creators, to serve as a docile workforce for the low numbered, but technologically advanced Isu. Artificially developed by drastically altering the pre-existing genetic make-up of native species, the creation of humanity left a sizable gap in terms of transitional species between archaic hominids and modern humans.

By 1997, the Templars, who were aware of the full and true nature of the First Civilization, had taken note of this, and arranged for fake skeletons to be planted in Ethiopia, so as to limit human exposure to the possibility of the existence of the First Civilization.

Early humans could not comprehend the true nature of their creators, choosing to see them as gods, and in order to ensure the obedience of their creations, the First Civilization bred a neurotransmitter into humanity, located deep within the brain. This neurotransmitter forced humanity to abide by the Pieces of Eden, which were technologically advanced pieces of equipment that granted a myriad of powers, including the ability to induce hallucinations in the minds of those bearing the transmitter, as well as telepathically control said humans.

However, there were humans born without the neurotransmitter, and as such were not susceptible to the mind-controlling powers of the Pieces of Eden. Over three centuries, their numbers grew, until they numbered enough to confront the First Civilization directly, resulting in the war which nearly destroyed both races.^[2]

血统

Since some human individuals were born without a neurotransmitter, Clay Kaczmarek would later theorize that this was made possible by cross-breeding between humanity and their "gods", and that not only did this remove the neurotransmitter, or at least the neurotransmitters susceptibility to the Pieces of Eden, but also granted a number of genetically encoded abilities.

One such ability, known as Eagle Vision, was particularly prevalent in the bloodline of the Assassin Altaïr Ibn-La'Ahad, with many of his descendants also bearing the ability.

It was also prevalent in the bloodline of the Auditore family and Giovanni Borgia. Additionally, possession of the mixed bloodline granted the bearer increased control over the technologies of the First Civilization; Ezio Auditore was able to use the a Staff and Apple of Eden conjunction to open the Vatican Vault, whilst the pure-blooded human Rodrigo Borgia could not.^[2]