Philosophy has inherited a powerful impulse to embrace either dualism or a reductive monism―either a radical separation of mind and body or the reduction of mind to body. Grosz draws from Spinoza's material and ideal concept of substance, Nietzsche's amor fati, Deleuze and Guattari's plane of immanence, Simondon's preindividual, and Raymond Ruyer's self-survey or autoaffection to show that the world preexists the evolution of the human and that its material and incorporeal forces are the conditions for all forms of life, human and nonhuman alike.