Unwanted pregnancy should be defined fundamentally in psychological and social terms. Regular contact with women caught up in this intensely human crisis leads one inexorably to a position supporting abortion on demand. Abortion is the option selected regularly by substantial numbers of women of every social class, intelligence level, religious, ethical, or cultural background. This choice represents an absolute historical continuity, for no human group of any time or place studied to date appears to have been abortion free. (33 pp.)