Gesell believed that the child's development was activated by genes and he called this process maturation
Gesell held the belief that genes were responsible for the development of a child. He actively opposed efforts to teach children. His reasoning for this was that he believed that children would naturally begin engaging in behaviors once their systems sufficiently matured.
Jean-Jacques Rousseau
Jean-Jacques Rousseau believed that children should be allowed their own ways of thinking, arguing that they had a biological timetable but were not little adults.
Biological maturation was monumental to terming Rousseau as the father of developmental psychology.
Culture is learned from parents, schools, houses of worship, media, friends and others throughout a lifetime.
Sources of culture and its development.
Culture teaches us how to live in a society and allows us to advance because each new generation can benefit from the solutions found and passed down from previous generations.
The solutions from one generation can often be passed down to newer generations for intergenerational use.
Development is multidimensional.
We change in the physical, cognitive, and psychosocial domains. They each pertain to physical capabilities, changes in intelligence and mental skills, and growth in emotional intelligence, conjointly with relationships in one's life, each respective to their own kinds of intelligence.
Development is multidirectional.
Humans don't change in simply one way. Rather, we can show gains and losses across aspects of our lives.
Development is lifelong.
Development doesn't stop at the age of 25. We are always changing and growing, even when society may tell us otherwise.