Humans, from the planet Earth, are the newest sentient species of notable size to enter the galactic stage and are the most rapidly expanding and developing. They independently discovered a Prothean data cache on Mars in 2148, and the mass relay networks shortly thereafter.
Racial Aspect: Human Spirit
Humans are generally seen to be very intelligent, abnormally ambitious, highly adaptable, individualistic and thus, unpredictable. They have a powerful desire to advance and improve themselves, and do so with such assertion that the normally staid Council races have been taken aback by their restlessness and relentless curiosity. Their economy, while much smaller than any of the Council races, is very powerful relative to their size, and their military prowess is amongst the greatest in the galaxy, despite the fact that only 3% of humans volunteer for the Alliance military, a far smaller proportion than other races. Their ability to defeat the turians in the First Contact War demonstrated graphically the potential of human military strength and is therefore a subject of concern for many races, who fear the consequences of another human-turian conflict.