This article argues that two significant implications of Wittgenstein's wri
tings for social thought are (1) that people are constitutively social bein
gs and (2) that the social context of an individual life is nexuses of prac
tice. Part one concretizes these ideas by examining the constitution of act
ion within practices. It begins by criticizing three arguments of Winch's t
hat suggest that action is inherently social. It then spells out two argume
nts for the practice constitution of action that are extractable from Wittg
enstein's remarks. Part two contrasts the conception of the social context
of individual life as practices with three historically significant concept
ions of such a context: totality; sui generis reality; and abstract structu
re. It also circumscribes that contemporary movement - practice theory - th
at develops the Wittgensteinian position and represents, perhaps, his most
significant legacy for social thought.