Sentence:  While anarchism and socialist <WSD>libertarians</WSD> have a rich history of revolutionary thinkers ranging from Emma Goldman to George Orwell, the best-known socialist <WSD>libertarian</WSD> thinker of today is probably Noam Chomsky. 
Meaning of the word marked with <WSD> tags:  A left-libertarian, an antiauthoritarian believer in both individual freedom and social justice (social equality and (mutual aid)), such as a social anarchist.