This article is concerned with the contribution that sociology has mad
e to our understanding of the ways in which friendships are socially p
atterned. Rather than treating these ties as individual or dyadic cons
tructions, it examines how the social and economic contexts in which t
hey develop influence their form. It focuses particularly on the impac
t that social location has on friendship, arguing that both class and
status divisions are important for understanding the character of info
rmal solidarities. However, both of these must be seen as dynamic, for
neither class nor status characteristics are fixed; both alter biogra
phically and historically, and as they alter they pattern the friendsh
ips individuals sustain. The final section of the article attempts to
explicate how structural change at the end of the 20th century will af
fect friendship. While some theories of privatization imply that infor
mal relationships are becoming less significant socially, the argument
developed here is that the transformations of late modernity are like
ly to result in informal solidarities of friendship becoming more cent
ral.