One believes in struggle, the other in unity.The word "believes" in there *deserves all our attention.-------------
The two sides have drawn a clear line between them and their arguments are diametrically opposed.One believes that competition between individuals will collectively increase the value of the whole as all the individuals better themselves... the other believes that when the best parts of each individual are brought forth for the benefit of the whole, the society betters itself.
I think it's quite clear that both are true, but...The one where an individuals progression is sought doesn't really find the value in the individual (other than the collection of them...) and the one where societies' progression is sought directly from the value of the individual doesn't really find value in society.
The blindness to the above 'values' exposes the need for the religions each (diametric) has *chosen.
I'm sure someone can shed even more light with clearer words than those... 
