Although a self-described Darwinist, Gould's emphasis was less gradualist and reductionist than most neo-Darwinists. He fiercely opposed many aspects of sociobiology and its intellectual descendant evolutionary psychology. He devoted considerable time to fighting against creationism, creation science, and intelligent design. Most notably, Gould provided expert testimony against the equal-time creationism law in "McLean v. Arkansas". Gould later developed the term "non-overlapping magisteria" (NOMA) to describe how, in his view, science and religion should not comment on each other's realm. Gould went on to develop this idea in some detail, particularly in the books "Rocks of Ages" (1999) and "The Hedgehog, the Fox, and the Magister's Pox" (2003). In a 1982 essay for "Natural History" Gould wrote: