Adamster has a point. On the other hand, there's still something wrong with the morals in this chapter.
There's the "survival of the fittest" thing. Adaptation of living beings is a fact established by the theory of evolution, but nobody said anything about being strong, whatever that's supposed to mean.
In my opinion the mc just let the others die without dirtying his own hands. Though, this is good food for thought.
I might end up getting sick of these shitty morals but may as well keep reading