High Quality Content aby WIKIPEDIA articles! This article is about the fictional races found within the Mass Effect universe. These races are explored in the novels Mass Effect: Revelation and Mass Effect: Ascension, and the video games Mass Effect, Mass Effect Galaxy, and Mass Effect 2. Other than the following, there is also mention that dozens of other intelligent races are known to Citadel space and the galaxy; these races are left unidentified, but new races may appear in subsequent storylines. The Citadel houses the main governing body of the Milky Way galaxy. Of the dozens of sentient races across the galaxy, the vast majority recognize the authority of the Citadel and its ruling Council. The Council's duties include regulating trade and keeping the peace between the member races of Citadel space. All races keep their own form of sovereign government and the Citadel Council generally does not interfere unless in matters that affect the galaxy as a whole.