It takes both technology and motivation. Why populate the next star system? Why the next? And the next few million? You need technology developed by a civilizat

It takes both technology and motivation. Why populate the next star system? Why the next? And the next few million? You need technology developed by a civilization with the need or desire to expand infinitely. Humanity's only motivation to send people out to suffer the deprivations of frontier life and colonize another star system is essentially religious, either owing it to the universe to spread life and preserve humanity, or the belief that life for our decedents would be better off if we cast off the old society and built a new one. Would this really drive us to millions of stars?