ok a little confused by what you were saying:
Evolution happens two ways (as i see it). Firstly as adapting to a known environment (like how humans are still evolving now) secondly, adapting to a change in environemnt (dinosaurs, affects of ice ages, etc).
Now, the gate is one of the latter. It is an environmental shock, a change to the system. It is still likely to cause change.
Now it is only natural seclection if there is some survival of the fittest. My assumptions were:
1) The aliens are killed by the opening wormhole
2) The aliens know that when the wormhole opens they will be killed (as opposed to "prisoner" i think that is episode where they do not).
3) The aliens do not want to die
4) The aliens have free will about moving away from the gate.
Now if you accept these assumptions, then it follows that if they do not move away from the gate then :
either:
1) they can't
2) they don't want to.
If you follow number 2 then it is because:
1) they don't know the gate kills them (stupid??? if others do)
2) they don't care (stupid).
so that is where natural seclection occurs.
Think of it as a room of humans with a gate opening and everyone knows that it will kill someone. Who will be by the gate and die:
1) People prepared to sacrifice themselves for others.
2) People who do not understand that they will die if they stand there
3) Weak people, ie if the stronger ones force them to stand there.
--> evolution on -ve kindness, intelligence and strength.
===
social evolution.
Not sure what your point was here. Why can't you have social evolution, in fact i am sure you can. Why do parents look after their children in mammals? because it increases chance of genetic survival. Is it a conincidence that the average life span of mammamals which stay as a family grups (chimps, moneys etc) is a few years after their grandchild will be born? Evolution has determined that grandparents live long enough to help look after their grandchildren but once they are old enough to fend for themselves (and genetic transfer is ensured) grandparents die.
The same sort of thing can be applied to ethics i believe. Why do we think it is wrong to kill people? Why do we have a circle mentatility, look after family first, then friends etc.. evolution.. part of our sociology is in our genes.
Know about game theory? and prisoners dilema? social evolution is what has over come that. That is why when small birds see a predator coming, one of them will start jumping up and down allterting all the others. Why this altrusitc action? it makes it more likely that that groups genes are passed down because it is less likely the whole lot are caught although the one making all the noise is far more likely to die. Also explains why bees will sting when they know they are going to die and you have "army ants".
Ramble ended.. make any sense?