There is no freewill - you are predestined to be the person you are
Predestination / Election: You place in life (regardless of good or bad) is already determined when you are born. Your success on Earth mirrors your place in the afterlife. This idea is favorable with the wealthy and not so much with the poor.
Significance of John Calvin:
Believes in hard work and good actions
His beliefs are socially divisive = Upper classes feel wonderful about their place in life but lower classes feel terrible and left out