1.Because that is to try to find very highly gifted individuals who are likely to make a difference in their generation.
make a difference 區別對待;有(重要)作用;有影響;有關系
What you have told me may make a difference to my own position.
你告訴我的一切,可能影響我自己的看法 。
Dose his absence make a difference to your work?
假如沒有他,對你的工作會有影響嗎?