Most of us, no matter our philosophical or religious bent, would agree that we should love our neighbor as ourselves. We would agree that you should do unto others as you would have others do unto you.
The question becomes: like the man asked Jesus, WHO is our neighbor? In our era of social media and cable news, has this been redefined into a broader scope? Seems like some posters are disagreeing vociferously about the answer to these questions.
If we now think of "neighbor" globally rather than just locally, how do we live it out? Since all of us are limited emotionally, financially, and time-wise, how do we select which neighbors we're going to really get involved with personally? Since I as an individual can't help everyone, who do I help?
Of course, "helping" also involves public policy. That's a way we can get involved on a larger scale.
Here is a great article by Jim Wallis on this subject. Even if you have a non-Christian belief system, I'd encourage you to read it because it can help people of all philosophies to think this through.
http://sojo.net/blogs/2012/12/17/what-we-parents-must-do