Historical Context of the Great Awakening
https://www.history.com/topics/british-history/great-awakening
History.com provides a thorough, yet succinct, summary of the details and conditions surrounding the so-called "Great Awakening" that occurred in the English colonies in the 1730s and 40s, in which Edwards played a major role.
Stanford Encyclopedia of Philosophy Entry on Jonathan Edwards
https://plato.stanford.edu/entries/edwards/
The context of Edwards's larger body of work is often left out of presentations of "Sinners in the Hands of an Angry God." This page will help give you a sense of the philosophical and theological thinking behind the sermon.