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We're closer to cows than chimps in our DNA, so I don't see why not
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We are? I don't think we're particularly close to anything, considering the damage 2% of DNA can do, which is the difference between us and chimps. We really aren't very chimp like at all, and they're usually taken to be the 'closest'.
One predator that certainly operates very successfully in the human environment is, er, humans. We've certainly evolved to defend ourselves against ourselves, and no mistake. Sociability does allow several other useful attributes such as long gestation periods (equals offspring more likely to survive and allows us to grow bigger and nastier, which is all good if you're trying to carve out a niche). It also makes up for a our rather poor senses (two pairs of eyes might spot the lion that one misses), which allows us to devote more evolutionary time to enlarging the brain to balance it up.