My son is awaiting an admissions decision from U. of Puget Sound, and they’ve been touting their #1 ranking on the Peace Corps list among small colleges and universities. The full list is here: http://files.peacecorps.gov/images/news/releases/schools2016.pdf
Note that some schools on that list have a much more liberal feel than others. For instance, I wouldn’t characterize either Bucknell or Gettysburg as super liberal – my understanding is that they’ve got more of a sporty/preppy/Greek vibe.
But then you asked for socially aware, not crunchy and lefty, and they’re somewhat different things I suppose.