A central component of Trivers's theory of parental investment is that human males from all cultures have evolved to have a smaller minimal possible parental investment compared to human females.

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Trivers's theory of parental investment suggests that, due to biological differences in reproduction, human males have a smaller minimal possible parental investment compared to females, as males can theoretically reproduce with minimal investment, while females have a higher obligatory investment due to pregnancy and childbirth.

A Central Component of Trivers's Theory of Parental Investment Is