Why does Mary Warren accuse Proctor of witchcraft at the end of this scene? What is the purpose behind this change in her character?

Mary sees how Abby has turned the judges against her, and because she fears being accused of being a witch, she denounces her previous claims of having pretended, and accuses John of influencing her. ... John ends up being accused of witchcraft, and Mary saves her own neck.

Explanation:  

warren buffett- the oracle of omaha warren buffett came from a normal type of family in nebraska. when hew as young, he understood the value of investing money and gaining interest on that investment. he strived hard at several jobs, but what made him one of the wealthiest men in the world was his gift for allocating capital within a free market system. warren buffett is an example of a man whose wealth is owed largely to the free enterprise system. buffett was able to allocate his money however he wanted, investing in businesses that he thought could compete effectively. without the free market system, he would not have the right to invest however he wanted, and would not have become so wealthy.

"freedom of speech, freedom of worship, freedom from want, and freedom from fear.

the four freedoms were goals articulated by united states president franklin d. roosevelt on january 6, 1941"