In 1994 I was fortunate enough to see, in the mountains of Rwanda and Uganda, a family of silverback Gorillas, before they were fully acclimatised to human contact.  I would like to avoid anthropomorphism, or unwarranted sentiment, but it was a very touching experience, my impression was that they were strikingly peaceful, beautiful creatures. I found their simplicity in direct contrast to us, their complex neighbours. Human beings had recently perpetrated a horrific genocide amongst themselves in Rwanda, and we, humans, have brought that genocide to the Gorillas too.

What can you do?

The New Scientist has some sound advice