See Cornelius Castoriadis The Imaginary Institution of Society http://en.wikipedia.org/wiki/Cornelius_Castoriadis on magma
See Sartre Critique of Dialectical Reason on the fused group http://en.wikipedia.org/wiki/Critique_of_Dialectical_Reason
See Cannetti Crowds and Power on the pack http://en.wikipedia.org/wiki/Crowds_and_Power
Identity like Presence, Reality and Truth are aspects of Being, which means that they transform as we go up the Meta-levels of Being. We can see all these meta-levels in the myth of Oedipus.
Since Institutions have Being then they must have the aspects at all the meta-levels leading right up to Ultra Being, i.e. Absolute Spirit as in Hegel.