The earth is made up of different "systems", not unlike our bodies.....and the health of each of the systems will ensure the health of the whole.....In general, Man does not "get" this.....WE are a plague on the health of the planet we call home. We drain wetlands, fracture the earth to procure fuel we burn that pollutes the air, kill magnificent creatures for their skin, antlers tusks...basically body parts which we wear, hang on our walls or turn into ridiculous "medicines" (i,e, aphrodesiacs) OR just for a photo op. We are currently leveling the Rain Forest which is not only home to uniquely magnificent creatures and indigenous tribes but also supplies a HUGE amount of the very oxygen we breathe. Big Cats should be protected in the wild for the good of all.....and since most people will never travel and see this creatures in their natural habitat......well run zoos could teach people about the marvels of our planet....our "fellow earthlings" if you will. I do NOT believe that "private ownership" is a good idea and "Fish and Wildlife" at this point, I would not trust to regulate....anything.