As geralds social superiority in his household name of nobility, mr birling largely feels a sense of inferiority as part of the Nouveau Riche of 1912 society, unaccepted and a social imposter to the generational stances of old money, he stands to desperately climb to aristocracy in able to have a chance at securing a place and name to his wealth, he urges to Gerald he has a "very good chance of knighthood", without much congratulation on the intention of heartwarming engagement between sheila and gerald, he cant hold in the egotistical confidence and triumphant flex of his rising power