Is shame the predominant social emotion? Perhaps, if you assimilate it to rivalry. There is another route that can be followed, that of ambivalence in dependence-love. When the loved object frustrates then you destroy it in imagination. Later, when love returns, you experience shame at the overkill and seek to make reparations etc. As this cycle repeats the self is forged out of the way that time forbids a perfect undoing. The origin of self and other in an intense field of force, a sort of black-hole which creates and destroys distinctions.