what are the advantages and disadvantages of collective forgetfulness

The lack of memories held by the community prevents them from adjusting their own destinies wisely, so they remain terrified of change and are forced to remain in a static, stagnant existence.

The advantages of collective forgetfulness are the loss of bad memories, grief, and individualism. Do you find these advantages?

The first part of the answer can be found at the link provided below;

http://www.gradesaver.com/the-giver/study-guide/major-themes/