Notwithstanding the fact that Cecil was a majestic being (who had a family) and his killing is absolutely abhorrent, what is even more heinous is the idea that we (humans) are “entitled" to kill (including each other) and pillage whatever we want around us simply because we can or because we "know better." It is the reason why we find ourselves battling the effects of Climate Crises e.g, the decimation of Bee populations, the California drought and subsequent devastating fires, super storms Sandy and Katrina and bigger ones yet to come, the heat waves in Europe that have already caused many deaths, etc., etc.
The saddest and perhaps most dangerous thing about the killing of Cecil is our failure to understand the bigger implication of our actions; that our ruthless indifference to such creatures and to what happens to them, is a reflection of our own decaying nature; that our increasing greed, self-centeredness and hubris about our "control" over the Earth and all life in it, is an indication of how simple-minded we've actually become; that in the end, our heartless actions and lack of care for each other as well as for our animal companions and for the only home we have: Earth, will result in the killing our selves and our children.
Einstein [...] once calculated that if all bees disappeared off the earth, four years later all humans would also have disappeared.
Abeilles et fleurs, June, 1965
For what happens to the children of man and what happens to the beasts is the same; as one dies, so dies the other. They all have the same breath, and man has no advantage over the beasts, for all is vanity.