The small-but-steady approach of birds, bees, and ants offers a better model for changing human behavior than the hop-to-it top-down model used by many companies and governments.

FORBES: The Birds and Bees of Sustainability

And in some ways, he says, the crude and outlandish images and behavior that typified the minstrel show are still evident in hip-hop and black comedy.

NPR: The Legacy of Blackface

Other prominent observers, such as social critic Stanley Crouch, claim that the deficits of hip hop blare beyond the borders of ugly art to inspire youth to even uglier behavior.

NPR: Author Comes to Hip-Hop Music's Defense

But over the past couple years, I've noticed a troubling cycling trend, a selfish behavior that seems to be increasing, as more and more people feel secure and hop on bikes.

WSJ: Jason Gay: Cyclists, Can You Hear Me Now?