The doctor shrugged. "As soon as the breakthrough in subspace theory that allowed the SURGE drive and SUDDAR was formulated, the concepts of not only Von Neumann probes but also interstellar colonization became possible. The USE started their interstellar probe project two years ago to much fanfare and national chest-thumping, and everyone else had to follow suit. Can’t let the other guy colonize the universe unchallenged, no?"