In his speech to his companions, wiglaf

Wiglaf is presented as an honorable, brave, and a loyal man. 
Even though his companions aren't brave people who wish to battle, he reminds them of the anglo-saxon values and chooses to help, instead of cower. 
A true warrior should never back down from a battle according to him, and he remains loyal and helpful.
I hope it's help

Social darwinism refers to the the theory that people who succeed in our economic system will one day out compete those who fail. one day the rich will out succeed the poor so we'll that there will eventually be no more poor