The article discusses the concept of "neuronal recycling" in the context of cultural domains such as reading and arithmetic. It proposes that cultural inventions, which are too recent to have influenced human evolution, invade evolutionarily older brain circuits and inherit many of their structural constraints. This hypothesis suggests that cultural maps, such as those for reading and arithmetic, are systematically located in specific brain regions and are remarkably invariant across cultures. These maps are thought to arise from minimal transformations of cortical precursor maps present in nonhuman primates. The article outlines the neuronal recycling hypothesis, which posits that cultural acquisitions find their "neuronal niche" through the reorientation of neural resources. It suggests that cultural maps are constrained by prior evolution and brain organization, and that the speed and ease of cultural acquisition in children depend on the complexity of the cortical remapping required. The hypothesis also predicts that cultural variability is limited, with strong cross-cultural invariants, and that the ease of acquiring certain cultural tools is influenced by prior cortical constraints. The article discusses evidence for cultural maps in reading and arithmetic, highlighting the visual word form area (VWFA) in the left occipito-temporal cortex, which is consistently activated during word reading. It also discusses the macromap, mesomap, and micromap organization of these maps, with the VWFA showing a reproducible location and cross-cultural consistency. The article further explores the evolutionary precursors of these maps, suggesting that they may have originated from universal cortical biases, such as morphogenetic and epigenetic maps. In the case of arithmetic, the intraparietal sulcus is consistently activated during number processing, and the article suggests that this activation may be related to an evolutionary precursor in nonhuman primates. The article concludes that the neuronal recycling hypothesis provides a framework for understanding how cultural domains are mapped in the brain, with cultural maps arising from minimal transformations of cortical precursor maps. The hypothesis suggests that the brain's ability to adapt to cultural inventions is constrained by its prior evolutionary organization.The article discusses the concept of "neuronal recycling" in the context of cultural domains such as reading and arithmetic. It proposes that cultural inventions, which are too recent to have influenced human evolution, invade evolutionarily older brain circuits and inherit many of their structural constraints. This hypothesis suggests that cultural maps, such as those for reading and arithmetic, are systematically located in specific brain regions and are remarkably invariant across cultures. These maps are thought to arise from minimal transformations of cortical precursor maps present in nonhuman primates. The article outlines the neuronal recycling hypothesis, which posits that cultural acquisitions find their "neuronal niche" through the reorientation of neural resources. It suggests that cultural maps are constrained by prior evolution and brain organization, and that the speed and ease of cultural acquisition in children depend on the complexity of the cortical remapping required. The hypothesis also predicts that cultural variability is limited, with strong cross-cultural invariants, and that the ease of acquiring certain cultural tools is influenced by prior cortical constraints. The article discusses evidence for cultural maps in reading and arithmetic, highlighting the visual word form area (VWFA) in the left occipito-temporal cortex, which is consistently activated during word reading. It also discusses the macromap, mesomap, and micromap organization of these maps, with the VWFA showing a reproducible location and cross-cultural consistency. The article further explores the evolutionary precursors of these maps, suggesting that they may have originated from universal cortical biases, such as morphogenetic and epigenetic maps. In the case of arithmetic, the intraparietal sulcus is consistently activated during number processing, and the article suggests that this activation may be related to an evolutionary precursor in nonhuman primates. The article concludes that the neuronal recycling hypothesis provides a framework for understanding how cultural domains are mapped in the brain, with cultural maps arising from minimal transformations of cortical precursor maps. The hypothesis suggests that the brain's ability to adapt to cultural inventions is constrained by its prior evolutionary organization.