C. B. Macpherson's project was to revise liberal-democratic theory in
the light of Marxism, to rescue the valuable part of the liberal tradi
tion from the dangers of capitalist market relations, and to democrati
ze socialism. I identify Macpherson's concept of political theory, whi
ch informs his project; reconstruct his criticisms of liberal democrat
ic theory and capitalist market relations; and note his prescriptions
for a better political theory and practice. The project remains signif
icant and valuable in a world in which political and economic liberali
sm is said to be triumphant and socialism dead or in retreat. It is no
t without its problems, however, which include an inadequate theory of
human nature and a lack of detail on the nature of a democratic socia
list society.