From the day a person is born, they begin a process of absorbing information from the environment around them. We learn to walk by watching and copying. We learn to talk by listening and copying. We lean to live through observing our environment.
Our environment is the society and the culture we live in. The society provides a framework for living and a set of values on each aspect of that framework. The values also include moral standards and expectation in life. The view on the way things are done comes from observation.
This is all quite natural, but the result is that many values are essentially arbitrary and form a constructed reality. A dramatic change, or a collapse of this construction leaves all of this learning worthless, or a liability.