This essay explores the nature of an important collective emotion, namely, collective remorse. Three accounts of collective remorse are presented and evaluated. The first involves an aggregate of group members remorseful over acts of their own associated with their group's act; the second an aggregate of persons remorseful over their group's act. The third account posits, in terms that are explained, a joint commitment of a group's members to constitute as far as is possible a single remorseful body. Construed according to this account the remorse of a nation that has wronged another nation is liable to make a particularly important contribution to international peace.