which text is valuable for gaining context about a historical event but is unreliable as "evidence"?

This pie chart shows statistics related to the world's population. a pie chart like this one is most for making predictions about the future. showing how parts make up a whole. presenting amounts over a period of time. comparing information from different sources.

Mao zedong called for the cultural revolution because he believed reforms threatened social equality

Rising and collecting taxes is an example of