My 'guess' is this: every human who ever cared for another human being--be it a spouse, child, parent, or a stranger--immediately knows that, whatever (crap) life throws at you, humans are capable of both incredible altruism (kindness) and evil (depravity). Sure, material (monetary) incentives might affect these sentiments at the margins, but whoever cared an instant for someone else knows this: in the final analysis, material benefits don't matter.
By way of analogy, the same may be said about 'religion'.
Also, the pre-existing biases of researchers in that particular 'study' should do the rest.
That’s pretty much where I’m at. How do we know?
My 'guess' is this: every human who ever cared for another human being--be it a spouse, child, parent, or a stranger--immediately knows that, whatever (crap) life throws at you, humans are capable of both incredible altruism (kindness) and evil (depravity). Sure, material (monetary) incentives might affect these sentiments at the margins, but whoever cared an instant for someone else knows this: in the final analysis, material benefits don't matter.
By way of analogy, the same may be said about 'religion'.
Also, the pre-existing biases of researchers in that particular 'study' should do the rest.
Many people have a strange love/hate relationship with their fellow human beings.