Grosz develops her argument by juxtaposing the work of three major figures in Western thought: Charles Darwin, Friedrich Nietzsche, and Henri Bergson. She reveals that in theorizing time as an active, positive phenomenon with its own characteristics and specific effects, each of these thinkers had a profound effect on contemporary understandings of the body in relation to time. She shows how their allied concepts of life, evolution, and becoming are manifest in the work of Gilles Deleuze and Luce Irigaray. Throughout The Nick of Time, Grosz emphasizes the political and cultural imperative to fundamentally rethink time: the more clearly we understand our temporal location as beings straddling the past and the future without the security of a stable and abiding present, the more transformation becomes conceivable.