I want to compare wild and captivity. This isn't a straight comparison of good with bad. Animals do suffer in the wild, and they are protected in good captivity. I will fill out the details of this in the following sections, before discussing how captivity can be more benign, whether or not it can ever strictly be regarded as better than life in the wild.
Bostock, S. (1995). Animal well-being in the wild and in captivity. In A. Rowan (Ed.) Wildlife Conservation, Zoos and Animal Protection: A Strategic Analysis (pp. 130-151).