I have a friend from elementary school whose parents met in the Peace Corps. From what I understand, it's great if you already have a desire to make a difference in the world. It is the kind of thing that I would have looked into for after college if I didn't get married.
It's also a good way to defer student loan repayment.

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Sage knows our mythic history, King Arthur's and Sir Caradoc's
She answers hard acrostics, has a pretty taste for paradox
She quotes in elegiacs all the crimes of Heliogabalus
In conics she can floor peculiarities parabolous
-C'hi