Our Legacy?

What is the legacy of humans? Is it what differentiates us from the other species? There is the opposable thumb. And we are the only animal that has sex over the phone.... But, it seems, everyday, another animal is making a tool or showing intelligence, true care and affection. We do legitimize things, like marriage, with ceremony and law to express importance. But do we know that other creatures aren't somehow celebrating or emphasizing their lives in a similar way? Absence of communication between species allows for imagination. Is our legacy war? Or the actions of our politicians? The Holocaust? Or love? I don't believe any of these things makes me feel special. This made me feel special. For a while. http://www.latimes.com/news/nationworld/nation/la-na-ny-gayweddings-pg,0,5287053.photogallery?index=lat-gay-wedding_loug8inc20110724084934