The article discusses the relationship between the structure of the human brain and intellectual functions. It explains that the brain's structure is closely linked to mental processes, and that intelligence is the result of the development of certain structures in the brain, particularly the pyramidal neurons in the cerebral cortex. These neurons are crucial for higher mental functions such as thought, memory, and reasoning. The article describes the microscopic structure of the brain, highlighting the layers of the cerebral cortex and the role of pyramidal neurons in cognitive abilities. It also notes that the number and development of these neurons are fixed before birth, and that their growth and development continue throughout life. The article emphasizes that the intelligence of a species is closely related to the development of these neurons, particularly in the frontal regions of the brain. It also discusses the importance of these neurons in determining mental capabilities, and how their underdevelopment can lead to intellectual disabilities. The article concludes by highlighting the significant sociological implications of this relationship, as the number of pyramidal neurons is fixed at birth and can be inherited.The article discusses the relationship between the structure of the human brain and intellectual functions. It explains that the brain's structure is closely linked to mental processes, and that intelligence is the result of the development of certain structures in the brain, particularly the pyramidal neurons in the cerebral cortex. These neurons are crucial for higher mental functions such as thought, memory, and reasoning. The article describes the microscopic structure of the brain, highlighting the layers of the cerebral cortex and the role of pyramidal neurons in cognitive abilities. It also notes that the number and development of these neurons are fixed before birth, and that their growth and development continue throughout life. The article emphasizes that the intelligence of a species is closely related to the development of these neurons, particularly in the frontal regions of the brain. It also discusses the importance of these neurons in determining mental capabilities, and how their underdevelopment can lead to intellectual disabilities. The article concludes by highlighting the significant sociological implications of this relationship, as the number of pyramidal neurons is fixed at birth and can be inherited.