text: Friedrich Engels ( ; 28 November 1820 â `` 5 August 1895 ) was a German entrepreneur , social scientist , author , political theorist , philosopher , and father of communist theory , alongside Karl Marx .
simplified: Friedrich Engels ( 28 November 1820 â `` 5 August 1895 ) was a German political thinker . With his friend Karl Marx , Engels wrote about Communism .