This study attempts to uncover the political values expressed, both explicitly and implicity, in modern Science Fiction (SF). It traces the Utopian tradition of writing, as early SF was influenced by this, but focuses primarily on the 20th century, when SF emerges as a genre. We argue that while SF can and does express both ideological and subversive values, the main thrust of innovative SF remains subversive. -- We attempt to determine also the social basis for SF, finding its core in the new scientific intelligentsia, and we see how as its position in society has altered, so also have the values expressed in SF
