Someone who is in a psychological state in which they feel disconnected from immediate experience is experiencing

De-realization

Explanation:

De-realization is a process in which a person feels detached from the external world. In this, the individual feels detached from friends, society, peer groups even from family. The individual would not recognize their family members. He/she started to behave like a stranger with their family members. An individual realize that the environment is foggy, detached and seems unreal and distorted.  

Some coping mechanism is there:

To cope up with De-realization: A person should pinch his/her skin with their hands to realize that they are in reality. Hold something cold or hot so can a person realize the real state.  

forty niners migrated west due to gold discovery in california and it the west was a new place for hope this : )

explanation:

the historians cited in the article all agree with one another about the cause of the civil war. despite coming from different backgrounds and cultures, the historians agree that slavery was the root cause of the civil war. the fact that all these historiansgenerally agree with one another makes their shared viewpoints more reliable and valid, especially because the historians have different backgrounds and all work for the well-respected institutions of howard university, clemson university, and the university of colorado.