Frederick Engels 
Socialism, Utopian and Scientific 

Whilst the greatest effort has been made to ensure the quality of this text, due to the historical nature of this content, in some rare cases there may be minor issues with legibility. Hobbes had systematized Bacon, without, however, furnishing a proof for Bacon’s funda mental principle, the origin of all human knowl edge from the world of sensation. It was Locke who, in his Essay on the Human Understanding, supplied this proof.