How do we learn the behaviors, attitudes, and other aspects of our culture?

We learn behaviors, attitudes and any other aspects of our culture through domestic education in early childhood.  Most forms are accepted at that age, even unconscious. Upgrading is done later, through life, through education, self-education, personal interests of the hobby. What is embedded in an early childhood is necessarily manifest later in life. Children can learn through different stories, later through schooling, lectures, but the most important thing is what children see, as the actions of adults, in the first place, parents, later teachers, the environment, the dominant social group, friends, employers, etc.  Everyone can say that he adopts what he hears and what he learns, but what comes out of the subconscious as a pattern is what we see around us.

imperial crisis leads to civil war.

roman forces withdraw from britain as goths attack rome.

odoacer topples romulus augustus

huns attack the empire and drive german peoples ahead of them.