Nolan's films are typically rooted in epistemological and metaphysical themes, exploring human morality, the construction of time, and the malleable nature of memory and personal identity. His body of work is permeated by materialistic perspectives, nonlinear storytelling, practical special effects, innovative soundscapes, large-format film photography, and analogous relationships between visual language and narrative elements. In addition to his filmmaking, he is an advocate for film preservation and the continued availability of film stock.