The fact that most animals developed excellent (or at least practical & functional) survival mechanisms and all sorts of finely-honed skills is testament to the tenacity and drive they all share, from the tiniest insect to the largest mammal. Distant ancestors stumbled on a niche, a way of surviving in a certain environment, where anything that gave even the tiniest advantage over the many competitors could prove vitally advantageous. That's why we've got such an astonishing variety of skills, tricks and courtship rituals these days: a plethora of lifestyles, often resonating surprisingly deep with our own, breathtakingly beautiful to behold. But it would be a gross inversion (and perversion) of causality to claim they were "created" that way; all life on earth is just using whatever skills it got handed out at birth - honed by parental and societal education and, if you're lucky, practice. Most of life is just an endless and mindless mimicry of parental behaviour - because of course, since the parents were successful in creating offspring, imitating their behaviour should be potentially rewarding. (Richard Dawkins gained fame for his "selfish gene" theory, which in essence boils down to this: all life forms are mere vessels shaped by genes. The purpose of these vessels is the safe storage and, in time, replication, of those genes.) This might sound like a life devoid of purpose as we know it; the teleological concept of "purpose" was invented by humans who observed all sorts of interesting stuff, from the strange and quarky subatomic world to the birth of new galaxies, and thought that all this effort must be serving some sort of higher purpose, right? (Because of this, we often modestly but myopically label ourselves the "pinnacle of creation" occupying the highest rung on the evolutionary ladder.) We are toolmakers after all, most of what we make or do is "for" something so it's perfectly understandable that we look at the world with those same purpose-driven eyes and dream up bigger versions of ourselves - celestial artisans with grand designs, ineffable watchmakers constructing intricate clocks.
But the nearer we get to our closer relatives (chimps & bonobos), the easier it is to recognize human behaviour as just another variation and development of our cousins' way of life, right up to power struggles and mating rituals. Not surprising then, that male dominance & aggression - alarmingly exacerbated and amplified by our tool- and weapon-building brains - continue to play such an important part in our lives. Giving divine grace to this behaviour by sanctioning the "dominion" over all other animals certainly didn't improve things; humanity is still doing its very best to root out all life on earth, driving one species after another into extinction. By thus "taking care" of the earth, we are slowly but inevitably killing ourselves.
But the future could be different; although both impeded and helped by our bipolar brains, it is certainly possible, though it will be hard work, for us to overcome (or at least curb & manage) our innate violence. It will probably take hundreds, if not thousands, of years, and these days the threat of a mass extinction looms larger than ever, but I am convinced it will be worth it. Some people defend their behaviour (including the consumption of meat) by pointing out that they are only doing what countless progenitors did. (In an earlier post I wrote that we transcended this however by becoming conscious of the mechanism of evolution.) But wasn't it Tolstoy who said that as long as there are slaughterhouses, there will be battlefields? Some people might find this far-fetched, but I sympathize completely. I am convinced that, if we pay more attention to animal life on the planet, and give them more space to live in dignity and freedom, we will automatically ameliorate our behaviour towards each other - to the eventual mutual benefit of every living being. We know so much and have come so far - it would be such a pity to slide back into our own violent past, which could destroy all that hardwon knowledge. I am appalled at the religious concept of sin, but this would be sinful behaviour indeed.