The title futility makes the poem seem strong, instead of just saying hopelessness. He used word futility in the poem to get across to people that the war is hopeless and by doing that he  uses personification, he uses the sun as an old calm man who shines light on the earth but as you get to the end of the poem he starts to say the sun is stupid for not saving anyone from dying then he says what the point of being here then. He was treating the sun like it was god.