Dual Inheritance Theory (DIT), also known as Gene-Culture Coevolution, was developed in the late 1970s and early 1980s to explain how human behavior is a product of two different and interacting evolutionary processes: genetic evolution and cultural evolution.

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  • Dual Inheritance Theory (DIT), also known as Gene-Culture Coevolution, was developed in the late 1970s and early 1980s to explain how human behavior is a product of two different and interacting evolutionary processes: genetic evolution and cultural evolution. DIT is a "middle-ground" between much of social science, which views culture as the primary cause of human behavioral variation, and human sociobiology and evolutionary psychology which view culture as an insignificant by-product of genetic selection . In DIT, culture is defined as information in human brains that got there by social learning. Cultural evolution is considered a Darwinian selection process that acts on cultural information. Dual Inheritance Theorists often describe this by analogy to genetic evolution, which is a Darwinian selection process acting on genetic information. Because genetic evolution is relatively well understood, most of DIT examines cultural evolution and the interactions between cultural evolution and genetic evolution.
  • 二重相続理論とは、人間を生物学的な進化と文化的な進化の間の相互作用の産物として捉えていく見方。「文化的な特性が生物学的な特性に優先する」といった見方と対比され1970年代から1980年代にかけて提唱された。二重相続理論では文化の伝播や発展は、遺伝的な特性によって影響・束縛を受けているとし（遺伝→文化への影響）、また文化の状態が淘汰圧として遺伝的な特性に影響を及ぼしていると考える（文化→遺伝）。そしてこの両方の相互作用の結果として、人類を捉えていく。すなわち遺伝的な階層とミーム（仮想的な文化的情報の単位）のような高次の階層との間で織り成される、一種の共進化を仮定する。これは学際的な分野であり、進化生物学、心理学、文化人類学といった領域と関わる。
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  • Dual Inheritance Theory (DIT), also known as Gene-Culture Coevolution, was developed in the late 1970s and early 1980s to explain how human behavior is a product of two different and interacting evolutionary processes: genetic evolution and cultural evolution.
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  • Dual inheritance theory
  • 二重相続理論
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