The Galaxy is a big place, made up of thousands of millions of worlds, and the work of exploration will probably never be entirely completed. But various systems within the Galaxy, each with its own particular humanoid race if intelligent beings, have joined in galactic federation for the mutual good of all concerned. Once major snag remained: speedy communication.
When space travel velocities were increased by the introduction of 5C drive on all but local planetary working vessels the way was opened to enormously expanded regions of movement. Piet Tek, captain of a space tramp, tells of what happened when the secret of instantaneous communication was prematurely exploited by unscrupulous people in search of power.