One new Scholarly Recent Evidence has Appeared: That Marx's Books such as "The Communist Manifesto", weren't Marx's Actual Theory in Whole, That he kept it from the Public because that book and some of his others were meant to inspire action, as Engels once said:
"A Ounce of Action is worth more than a Ton Of Theoretics"
Recently Marx's personal Manuscripts have been recovered and Printed, and Many New Revealations on Marx's Grand Theory of the Revolution, History, Economics, and the World are revealed. To see a Printed version of this, see:
"The Economic and Philosophic Manuscripts of 1844 Karl Marx and the Communist Manifesto"
The validity of these Manuscripts are possibly doubted, but nonetheless they seem like clear, summarized, and excellently done Theoretical Philosophy.