How does one's viewpoint, or social viewpoint, affect they way history and events and can be recorded?

A person's (or a society's) own particular viewpoint cannot help
but affect the way that history and events are recorded.  People tend to record history in ways
that fit with what they want or need to think about themselves and the
world.

As an example of this, history textbooks from decades ago
tended to portray Native Americans as savages who were in the way of progress.  This was because
Americans wanted to portray themselves as the bringers of civilization.  Nowadays, textbooks tend
to emphasize Native Americans as more of noble people who lived in harmony with their
environment.  This is because the people who write most texts are people who feel that Americans
need to be more protective of the environment.

In this way, the
point of view of the person or society that records the history has a great deal to do with how
that history is recorded.