Although the low level of unionization in the U.S. has been attributed
to status divisions and stratification among workers, little research
has addressed the mechanisms by which status complexity limits unioni
zation potential. Our analysis of variation in prounion attitudes in a
national, U.S. sample of nonunion workers suggests that corporations
have tended to legitimize themselves by appealing to the occupational
identities of high-status workers whereas unions have tended to legiti
mize themselves by appealing to the social background identities - e.g
., ethnic-racial and gender identities - of low-status workers. Our fi
ndings indicate that prounion sentiment is strongest among socially di
verse, low-socioeconomic status workers.