dude. not to be a bitch, but you just described the opposite of darwin's theory of natural selection.
basically, what i described in my other post, is exactly derrived from darwin's theory. now, at first, we were not meat eaters. we didnt have the ability to do such and we werent built in such a manner...but according to darwin, and anthropologists of the 20th century, natural selection preferred the following important traits: bigger skull for bigger brain, teeth...the teeth give away the most about our ancestor's eating ability and habbits.our jaws became smaller and faces became smaller.
we evolved into intellectual creatures who EVENTUALLY though NOT INITIALLY could hunt and consume meat. how did they theorize all of this? and how have they concluded that we were once veggies? by examining the important traits above. those traits were at one time, lesser, but according to darwin, natural selection allowed for those traits to evolve so that our species would survive and adapt.
now, to address your reference to "lucy".. lucy was an australopithecus. australopithecus are not related to us. this is because they existed at the same time as homo habilis..who are OUR DIRECT ancestors. a lot of anthropologists dont agree on many things..but one thing they do agree on is that homo habilis is our direct ancestor..and that the australopithecus line became extinct about 1 million years ago. the problem with this is that australopithecus is in a sense our oldest ancestor, but they continued to exist (australopithecus africanus, robustus etc.) at the same time as the homo habilis and almost the same as homo erectus. so around about 4 million years ago..our lineage split and we continued on the path of homo habilis, whereas the australopithecines continued as they were. this means that somewhere along the line, "natural selection" allowed our ancestor homo habilis to form OUT of the australopithecus...but it is the australopithecus species that was rejected. so in a sense, what you're saying is that we might all be like lucy if we were once veggies. well, no...because of natural selection, we arent like lucy, we evolved OUT of veggies. but we were still, at one point, veggies. which is the whole point i was trying to make earlier.
you want to know when we started hunting and eating meat?
well, we'll say about 3 million years ago we were eating seeds, nuts, and the like. it was only 2.5 million years ago that we even made our first tools, so we werent out hunting and eating meat until then, we werent capable of it. the first tools we ever made were small flake tools. the tool is about 4-5 inches long..what they could do with it, was slice up smaller animals..but it wasnt until abouuuut 2 million years ago (homo habilis) that we started to chew meat. all of this happened at the same time our jaws and faces started to reduce in size and our brains expanded in size. so after thousands of years of using tools, we were finally able to cut up, and chew meat thanks to "natural selection" according to darwin.
hope that all makes sense to you now.
