This is a good question,
If she had not eaten the fruite then she would not have offered it to Adam and we probably wouldn't even be alive right now. Life on earth would take a completelyl differnt path. Humans would be perfect in every way.
There wouldn't be death, sickness, and etc. The human body would be capable of completely regenerating indefinietely. As perfect individuals there would be no need for power, war, money....
Some think this makes the world intresting. I've never found a war zone intresting. But to each his/her own.