This week’s tragic events in Blacksburg demonstrate how one person can affect the lives of so many. Cho Seung Hui’s actions not only affected his immediate victims, but also their loved ones, the students and faculty at Virginia Tech and all of us who have watched the news unfold in the media. I often think of the potential impact of one person as a positive force in our society. And it is that positive impact on which I would like to focus, but I can’t help noticing that the negative is more often what grabs our attention.

Thankfully, there are other individuals who are making a difference in this world, for better and not for worse. Bill McKibben is the force behind the Step It Up 2007 campaign, which focused on bringing more attention to the issues of climate change and global warming. The kick off event, a “nationwide do-it-yourself mass protest” included more than 1,400 locally-organized events involving thousands of people all over the country on April 14. McKibben’s writings leading up to and since the event are heartfelt and inspiring. His enthusiasm embodies the kind of energy and commitment we need more of in our country and our world.