Hi thomaspayne, it appears that most respondants have mis-read you question, and replied in some manner describing Easter , such as what it was or when was it.
However you specifically ask for the "..history of e(sic)aster?"
That's an enormous question and the best way to answer it is to Google your own question!
When I did this, the first item in the list was "History Today", ans excellent publication, and does try to give the "history of Easter."
Well recommended.