I feel for everyone involved: the child, the distressed mother, the zoo employees called upon to shoot a creature that they had raised from birth — one of the last of his kind. As for Harambe, his death just makes me very, very sad.
I have looked at the footage of the incident, and have thoughts, but given I am in no way an expert, or even slightly conversant in gorilla behaviour, I will not stoke the fire. I will keep my observations to myself.
But here is what I do know: when there is conflict between humans and wild animals, whether they be a gorilla in a zoo, a performing elephant, or a fox living on a piece of land to be developed, the animal almost always loses.
What can you do? You can reject circuses, zoos and aquariums that exploit animals for entertainment. Rather than trapping and relocating wildlife on your property, you can learn to coexist. If we make these changes, maybe one day the animals will stop losing.