According to HatchSource 1what was the "most crucial event in American history that led to the rapid change and creation of new religions and denominations?

The Second Great Awakening

Explanation:

The Second Great Awakening which began in 1790 arising from a result of Protestant revival action during the early nineteenth century was the "most crucial event" in American history that led to the rapid change and creation of new religions and denominations.

This is evident in the fact that there was an increase in the number of Baptist and Methodist membership in the American colonies during the period.