At the population-species level, the relationship between individuals within the population and within the species takes on a special role. In this case, populations act as elementary, further non-decomposable evolutionary units, which are genetically open systems (individuals from different populations sometimes interbreed, and populations exchange genetic information).
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.