What is a fundamental source of political socialization?

The fundamental source of political socialization is the family. What is learned first is learned best. Also, what is learned first structures later learning. Family's beliefs and attitudes towards politics will be person's first political socialization experience. Since young children tend to spend the majority of their time with their family members, their family's political values and views will become the core base of person's political beliefs. Later on in life, when person starts attending school, his/her political views start to further shape under influence of his/her teachers and peers.