You should give an argument for this and explain its relevance. Since you haven’t, I’ll say no more.
I’ll add that this sounds like a rather naive claim. If we “acquired” it from them, from whom did they “acquire” it? I’m guessing you just mean that certain aspects of what would properly be called “moral behavior” in humans can be observed in other species. But so what? Why would you think that that “messes” morality up?
Sorry, I’m wary of the ban. Here’s a fuller explanation, but if anyone wants to debate evolution we’ll have to shimmy on over to Back Fence.
From
the Stanford Encyclopedia of Philosophy:
*Both scholarly and popular work on animal behavior suggests that many of the activities that are thought to be distinct to humans occur in non-humans. For example, many species of non-humans develop long lasting kinship ties—orangutan mothers stay with their young for eight to ten years and while they eventually part company, they continue to maintain their relationships. Less solitary animals, such as chimpanzees, baboons, wolves, and elephants maintain extended family units built upon complex individual relationships, for long periods of time.
…Coyotes, elephants and killer whales are also among the species for which profound effects of grief have been reported (Bekoff 2000) and many dog owners can provide similar accounts.
…It appears then that most of the capacities that are thought to distinguish humans as morally considerable beings, have been observed, often in less elaborate form, in the non-human world.*
I’m quoting that article (which is really about animal rights) to show that the weight of evidence has overturned the old philosophical assumption that moral capacity is purely human. Other species are not moral in the usual sense of the word, but it’s uncontroversial to claim that the underlying “engineering” first developed in ancestor social species, which humans inherited along with our four limbs and two eyes. This view of us is inherent in evolution, although I guess it was only relatively recently that it became mainstream.
*Professor Frans de Waal, a primate behaviourist at Emory University, Atlanta, Georgia, said: "I don’t believe animals are moral in the sense we humans are – with well developed and reasoned sense of right and wrong – rather that human morality incorporates a set of psychological tendencies and capacities such as empathy, reciprocity, a desire for co-operation and harmony that are older than our species.
“Human morality was not formed from scratch, but grew out of our primate psychology. Primate psychology has ancient roots, and I agree that other animals show many of the same tendencies and have an intense sociality.” -
telegraph.co.uk/earth/wildlife/5373379/Animals-can-tell-right-from-wrong.html*
This vital emotive side to our machinery isn’t limited to hard-wired rules but necessarily helps us deal with the novel situations that arise in a social species. It is why we can often make rapid intuitive decisions and why we are so much more than computers. We use it, as you said, in tandem with our rational abilities, but the emotions are hard to put into words – in Luke 10:30-37 Jesus uses a parable because it’s very hard to evoke the feeling of mercy without using an example with which we can empathize.
The equipment developed to aid individual and collective survival, and one necessary feature is that we can adapt our moral judgments and standards in changing times. Standards help to define and aid the cohesion of our tribe but must allow for adaptation to prevailing conditions.
So, this little story explains why morality varies: some features remain fairly constant across all cultures (they always aid survival) while others differ. Everyone in a culture tends to have similar morality (cohesion), while close-knit groups tend to share an even more similar morality, and individual differences can still come into play. It is messy but explains the real world. It also allows for the two extremes we sometimes see (a) pick’n’mix relativity works against cohesion, and (b) warring over who thinks they are absolutely right.
Finally, it explains why it’s so hard to define absolutes (the emotive side is very hard to frame in words) and why they are so elusive (we are built to adapt, not to be set in stone).