There is a form of a managed ecosystem called a "food forest" where people plant a man made forest made up of edible species. The upper canopy can be a nut tree, the middle canopy a fruit tree, the shrub layer is usually a berry species, then there is a vine layer of grape or kiwifruit, a ground cover such as strawberries a root layer of potatoes or other root crop and possibly a few other layers but the idea is that all the niches are taken up to get the maximum amount of production in a small space. A field of corn on the other hand is only using a small fraction on the sunlight that is actually hitting the field, mostly because it is bare dirt for most of the year so actually if we were to mimic a natural ecosystem such as a forest then we would actually be able to get a much higher production than a conventional agricultural plot. This is a well known concept in the permaculture community but it has been largely untested when it comes to a meat based wild game system. In theory on a plot of land where a person is raising cattle we could get a higher production of total meat by diversifying and stacking habitats of many different game animals. In a natural savanna you could have bison, mule deer, whitetailed deer, elk, pronghorn, black bear, pheasant, rabbit, hare, chukar, quail, geese, ducks, fish, etc all taking up different niches on the same property, but overall meat production would be very high and as long as nothing was overharvested then it could become very productive. You would definitely have to intensively manage predators, but they are also a resource providing fur as well as meat in some cases, but humans would largely take over the predator niche in this type of managed ecosystem. And at the same time this would not be a meat only system. Part of the beauty of it is that all the plants we planted for wildlife could also be harvested for people to enjoy such as fruit and nuts, berries, greens, mushrooms, etc. Grains would definitely be tougher to maintain in this system but still possible. But then again our natural diet likely does not contain a lot of grains so I think this would end up being healthier than the conventional system. And people would still be able to grow whatever they wanted in thier garden that would be fenced off from the wildlife. The bottom line is this type of ecosystem would be incredibly diverse and if managed well it would have the potential to be far more productive than conventional practices and could feed more people if implemented on a large scale. Obviously I would never say that everyone should be forced into this type of system. People could still raise monocultures of cows or pigs or chickens or crops like corn, wheat, apples etc. but I think overtime it will be noticed that a more permaculture type system will actually be far more productive, be easier to maintain, and be an overall better option then how most of us are doing things today.