Full Idea
In Marx's view the essential factor in capitalism is that the encroachment of the commodity form into society fundamentally changes the world.
Gist of Idea
Capitalism changes the world, by socialising the idea of a commodity
Source
report of Karl Marx (works [1860]) by Andrew Bowie - Introduction to German Philosophy 6 'Historical'
Book Reference
Bowie,Andrew: 'Introduction to German Philosophy' [Polity 2003], p.130
A Reaction
The main point is that people and their labour become commodities. Haven't animals always been treated as commodities? Clearly slave were commodities, long before capitalism. Capitalism universalises it?