Bernard Joseph Crespi FRSC is an American professor of evolutionary biology at Simon Fraser University in British Columbia, Canada.

After earning his PhD and conducting postdoctoral work in Europe, Crespi joined the faculty at Simon Fraser University in 1992.

The imprinted brain theory is a variant of the conflict theory of imprinting which argues that in diploid organisms, such as humans, the maternal and paternal set of genes may have antagonistic reproductive interests since the mother and father may have antagonistic interests regarding the development of the child.

[7] In 2013, Crespi and fellow UMich alumni Kyle Summers co-edited "Human Social Evolution, The Foundational Works of Richard D. Alexander," which was published through the Oxford University Press.

[8] In 2016, Crespi won SFU's Nora and Ted Sterling Prize in Support of Controversy for his evolutionary biology research.