The optimism of Modernism expressed itself in a variety of fashions. Silver Age science fiction perhaps the grandest of them all, the infinite potential of technology was a playground which hundreds of writers rushed to frolic on. Jaunts to Mars, telekinetic communication, robot servants — a universe of ideas was the genre’s oyster. Space flight perhaps the most utilized trope, there was no shortage of schemes and inspiration about how mankind could achieve the stars. Approaching in realist mode (chronologically, that is), James Blish and his CITIES IN FLIGHT sequence posited that discoveries in mathematics and solar system exploration would be the ticket to the galaxy.