The Overlord wrote:
"One race is holding another race back and that race needs to be destroyed for the other race to thrive."
Stand by for mandatory "Archer didn't kill anyone, he just refused to interfere with teh natural selexsh0n!"
It's kinda disappointing to see how many people don't realise that refusing to aid a man in mortal peril is the same as killing him yourself. The choice that Phlox and Archer made was not only severely unethical, it was also appallingly immoral.
I don't think Archer and Phlox are guilty of committing genocide, they didn't create the disease so they aren't actively responsible for it. They did nothing and as Edmund Burke said "All that is necessary for evil to triumph is for good men to do nothing".
Archer and Phlox are comparable to the politicians in the West who made excuses to do nothing while the genocide in Rwanda was occurring. However Phlox and Archer are worse, because them giving the cure to Valakians would have taken a lot less effort then stopping the genocide in Rwanda and then they have the gall to think their inaction makes them morally superior to others. Its a screwed up script when the "heroes" allow a great tragedy to occur and then justify their inaction with the same eugenics pseudo science the Nazis used to justify their actions. Phlox and Archer may not have actively committed genocide, but they did is immoral.