The Galactic Synthesis Of Human Psychodynamics With Interstellar Coordination

In Poul Anderson's "The Chapter Ends," the reference to psychotechnicians is a link back to the Psychotechnic Institute of the United Nations and Solar Union periods whereas the reference to an Integrator is a link back to the Coordination Service of the Stellar Union period so maybe the Galactics synthesize the best aspects of those earlier periods?

At the same time, the reference to a First Empire that has not been mentioned before but that fell fifty thousand years previously shows that the bulk of humanity has had enough time to:

migrate towards the Galactic Center;
extend their lifetimes by hundreds of years;
gain control of their nervous systems;
mutate their brains in order to control cosmic forces;
interact with the gas-giant-dwelling Hulduvians.

Although Sandra Miesel's Foreword to Anderson's Starship says that our species remains imperfectible, major changes have been made and earlier problems have been overcome.