1.2.5 Having a fixed and very narrow idea of a group of people is​

stereotype

Explanation:

A stereotype is a fixed general image or set of characteristics that a lot of people believe represent a particular type of person or thing. ... If someone is stereotyped as something, people form a fixed general idea or image of them, so that it is assumed that they will behave in a particular way.

they all focused on themes about the inevitability of death.

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