John Proctor identifies revenge as the true evil that is afflicting Salem village. What evidence is there to support Proctor's assertion?

The fued between the Putnams and the Nurses over land
seems to be a great originator of the evil afflicting Salem as well. The Putnams have
ill will against the Nurses for not supporting their brother-in-law as the new minister
as well as disputes over land... where boundaries lie.

It
also seems as if the Putnams encourage the girls to cry out names of people associated
with the Devil. The Putnams had sure already made their share of complaints against
people known to be upstanding citizens. If you listen to Mrs. Putnam speak about Rebecca
Nurse, there seems to be an apparent jealousy about the ability to have healthy
children.

These pieces of information demonstrate the
Putnams had purpose for revenge. Anyone associated with the Nurses (including the
Proctors) incurred their wrath.