Answer:

ENGELS

Answer	Crossword Clue
ENGELS	"Communist Manifesto" co-author
ENGELS	"Socialism: Utopian and Scientific" author
ENGELS	Marx collaborator

ENGELS	Editor of two "Das Kapital" volumes
ENGELS	Coauthor of a historic manifesto
ENGELS	Socialist Friedrich
ENGELS	1848 manifesto co-author
ENGELS	"Das Kapital" editor
ENGELS	Collaborator with Marx
ENGELS	Marx's coauthor
ENGELS	Marx colleague

ENGELS	"The Condition of the Working Class in England" author
ENGELS	"Communist Manifesto" coauthor
ENGELS	Co-author of Das Kapital (1820-95).
ENGELS	Marx's associate.
ENGELS	Karl Marx's associate.
ENGELS	Marx' associate.
ENGELS	Marx's colleague.
ENGELS	Marx associate

ENGELS	... law (spending theory)
ENGELS	Famous German socialist
ENGELS	Marx's collaborator
ENGELS	Associate of Karl Marx
ENGELS	Collaborator of Marx
ENGELS	"Anti-Dühring" author
ENGELS	Manifesto writer of 1848
ENGELS	Marx's collaborator on "The Communist Manifesto"

ENGELS	Communist Friedrich
ENGELS	Co-author of "The Communist Manifesto"
ENGELS	'Das Kapital' editor
ENGELS	Associate of Marx
ENGELS	Marx's manifesto co-author
ENGELS	"The Communist Manifesto" co-author