This article examines competing hypotheses on law derived from the the
ories of Talcott Parsons, Niklas Luhmann, and Jurgen Habermas in light
of the recent history of U.S. abortion law, specifically the Supreme
Court's rulings on abortion over the past two decades. The evidence I
advance suggests that Luhmann's theory cannot explain how abortion law
since 1973 has developed with the influence of certain nonlegal conte
xts. The perspectives of Parsons and Habermas, on the other hand adequ
ately grasp some of the outside influences on the legal abortion proce
ss. Parsons's theory particularly shows its strength in accounting for
the political influences on abortion law and the individualistic natu
re of the American legal system. Habermas's theory rightly emphasizes
the delicate force of lifeworld claims over the normativity of law as
well as the relevance of a medical-technocratic reformulation of legal
justifications. I conclude by arguing that sociological analyses of l
aw should strive to conceptually elucidate the continuing struggles ov
er and through law, and that they should recognize, particularly in li
ght of growing multiculturalism, the loss of integrative force modern
law continues to ascribe to itself.