ABSTRACT
Because the basic goods intrinsic to human flourishing are multiple, and because each human being belongs to a number of communities (each of whose common good is an aspect of the intrinsic good of each of its members), our responsibilities are complex. Similarly complex is the theory which accurately identifies these goods, communities and responsi bilities — natural law theory. The complexity of this theory is enhanced by the complexity of rational choice and action, in which ends, means, and unintended but foreseen side-effects each fall within the chooser’s respon sibility, but in very different ways.