In the Milky Way galaxy of 1000 years hence, six vastly different starfaring races co-exist under a precarious truce--a volatile peace that is threatened by the presence of the newcomers, the most recent addition tot he galactic community . . . the species called Man.
Flights of the imagination from Robert Silverberg, David Brin, Poul Anderson, Robert Sheckley and Harry Turtledove.