@fulhamish, Putin said: "I expect that we'll go down this rabbit hole where people are forced to defend Darwinian evolution from your peppering of questions and people will end up forgetting what the original topic was about and you'll be left off the hook again."
I share his concern. As an attempt to head this off at the pass, here are some key biological concepts (off the top of my head) that might be important to realize if one is trying to understand evolution and is approaching it from the standpoint of a Creationist skeptic:
1) Genetic variation and natural selection are two distinct things... genetic variation is what makes each individual unique in their population and is determined through the dice roll of reproduction and mutation... Natural Selection is a negative force - it favors the death of those individuals who are not well adapted to their particular environment... but it does not select what those adaptations might be in the first place (genetic variation does that).
2) There are many genetic variations that are not adaptations, and a very few that are. An adaptation is a genetic variation that has adaptive value in the environment. Many variations are retained simply because they have no significant negative effect on survivability. The presence of a variation does not infer that it is adaptive of something.
3) Some genetic variations are simply associated with another genetic variation that has survival value and thus is selected for... i.e. some variations get a free ride because they come with the useful adaptation.
4) Natural selection pressures are most severe when the organism is most out of tune with the environment - this often happens when there is a sudden and significant change in the environment. This can result, and often does, in extinction. As a population acquires an adaptation over a number of generations, the pressure on the population to "perfect" the adaptation lessens... the adaptation only need be good enough to survive... approaching perfection is an asymptotic thing.
5) Vestigial structures - structures left over from an adaptation for an environment that no longer acts on the organism - may persist for quite some time (and can be compelling evidence of the previous environment and evolutionary path of a population). As with random genetic variation, these former adaptations - now vestigial - may have little to no effect on survivability and therefore may persist in a population for some time, perhaps indefinitely.
6) The mathematics of natural selection are commonly misunderstood. Genetic variation from generation to generation can be, and usually is, very slight. Natural selection accumulates change very slowly most of the time. It's just we have many millions to many billions of iterations to make it possible. I liken it to the game of Yahtzee. Roll a set of 5 dice once, select out the dice you want to keep, roll the remainder again. One does not need to roll a Yahtzee (5 of a kind) in one roll - the chances of that are admittedly relatively small. The probability of a Yahtzee in a single roll is 1 in 1296... whereas the probability in any three-roll turn is roughly 1 in 22 attempts. A huge difference. Besides, in nature, since many different adaptations work in the same environment (thus how we get whole ecosystems rather than a single species by itself), one need not even wait for the Yahtzee... a significant number of different results will suffice to improve the survival chances of that population.
7) Behaviors are complex in their origins... they have genetic, developmental, environmental and social factors that determine them not to mention the possibility (unproven) of free will. When people talk fast and loose about a behavior being something we evolved for reason X or Y - they are displaying a set of serious misconceptions about how evolution works. Further, when someone uses the holes in such generalizations to try and shoot down evolution and they therefore hope to use that as a basis for an argument for a need for a god, they again are basing such arguments on misconceptions... and thus a Strawman.
Hopefully this serves my purpose - addressing questions you might have, en masse... if you pursue further argument in this thread that fails to take into account the above basic science, I for one will ignore it. Should you have genuine, honest questions about how some aspect of evolution operates maybe we can answer that for you - but we're not here, as Putin points out, to be defending evolution from attacks... at least not in this thread.
Is morality associated with or selected for within natural selection? That is a reasonable question - and your answer would apparently be "no"... and your answer would likely also be that morality is not a social construct but is absolute and provided by a god. That *is* a view... Question is, can you support it directly?