Depending on the person, they typically revolve around employment and economic reasons
Both diary entries and autobiographies are subjective. Depending on the person who wrote it, the retelling of the same event may differ because everyone experienced and feels things differently. Also socioeconomic status, religion, race etc can have an impact on the experiences of events.
Wow lol thats the discussion topic.
No we don't, because there will be other ways for the future generations to see what we did, like journals, and movies. Also our records will always be saved online as long as Google keeps all the information.