I see that as irrelevant - and I've already seen people on the left and on the right randomly claiming that humans as innocent or crooked at birth, giving random examples meant to illustrate it (there's plenty for both sides), as if it even meant something in regard to policies to support. Human behavior is essentially cultural no matter what. Even if there was a tendency at birth, one way or the other, it's very quickly reshaped by education and socialization (often even earlier than we usually realize). For the better and/or the worse. Because some cultures favor altruism and collectivity and others favor selfishness and individuality. And both can have disastrous implications, on many levels.
Basic example, some cultures value wealth differences, and see as heroes and models the individuals that distinguish themselves with their own personal accumulated material wealth. Other cultures shame and distrust such people, who are immediately suspected of witchcraft, both as means (how did they amass this wealth) and as mentality (greed being a witchy trait). Some cultures encourage you to think of yourself as an individual, others to think in terms of collectivity, village, lineage, network you're an element of. Some cultures value growth and innovations, others prevent growth and deny innovation (innovations still happen but are mythically retconned as having always been that way). Some culture let you benefit from your gains, others force you to distribute it entirely (and I mean : entirely), enforcing mutual co-dependancy. And these are never brute laws imposed on unwilling people, they are a system of value, embraced by most (there's always dissent in every society no matter the size) and internalized through pride, shame, honor, common sense, morality, etc.
Of course, it's a diversity that diminishes. Because it produces societies with different efficiencies on different levels, and the efficiency at technologically (or economically) stomping another society determines which one endures, at which cost (isolation), with which consequences (pollution), etc. The boom of transportation that shrunk the world made the co-existence of these systems very difficult - and quite often, hybridations are defined as "corruption" on both sides. But if you take a snapshot of that diversity, say, 50 years ago only, it really relativizes the idea of a system of organisation or values that would be more "natural" to mankind than others. All these systems have existed for eons, and systems that were unsustainable wouldn't have, well, sustained themselves so far, in isolation, technically or ideologically.
So basically yes, we keep learning and unlearning to be nice to each others, and our state at birth, whichever it is, clearly doesn't play a big role in that. The stable outcomes (barring antagonistic clashes between each others) are too diverse.