Culture is learned

Human infants come into the world with basic drives such as hunger and thirst, but they do not possess instinctive patterns of behavior to satisfy them. Likewise, they are without any cultural knowledge. However, they are genetically predisposed to rapidly learn language and other cultural traits. New born humans are amazing learning machines. Any normal baby can be placed into any family on earth and grow up to learn their culture and accept it as his or her own. Since culture is non-instinctive, we are not genetically programmed to learn a particular one.

North American childreninformally learning theculture of their parents
Every human generation potentially can discover new things and invent better technologies. The new cultural skills and knowledge are added onto what was learned in previous generations. As a result, culture is cumulative. Due to this cumulative effect, most high school students today are now familiar with mathematical insights and solutions that ancient Greeks such as Archimedes and Pythagoras struggled their lives to discover.
Cultural evolution is due to the cumulative effect of culture. We now understand that the time between major cultural inventions has become steadily shorter, especially since the invention of agriculture 8,000-10,000 years ago. The progressively larger human population after that time was very likely both a consequence and a cause of accelerating culture growth. The more people there are, the more likely new ideas and information will accumulate. If those ideas result in a larger, more secure food supplies, the population will inevitably grow. In a sense, culture has been the human solution to surviving changing environments, but it has continuously compounded the problem by making it possible for more humans to stay alive. In other words, human cultural evolution can be seen as solving a problem that causes the same problem again and again. The ultimate cost of success of cultural technology has been a need to produce more and more food for more and more people.