Marx Engles

“If from a philosophical point of view one considers this evolution of individuals in the common conditions of existence of estates and classes, which followed upon on one another, and in the accompanying general conceptions forced upon them, it is certainly very easy to imagine that in these individuals the species, or ‘man’, has evolved, or that they evolved ‘man’- and in this way one can give clouts to the ear.”
– second paragraph pg 22.

The very last sentence with the meaning of species man and how it correlates to one can give clouts to the ear.

Here's a site for those new to Marx and Marxism, in case you want to understand the general idea of the ideology, you can read the overview:
http://www.radicalacademy.com/philmarx.htm#characteristics