[VladRussian2]

there is no need for Non-Newtonian locomotion. We just need to learn how to get reaction from vacuum/space. Space expansion is an existing phenomenon providing for FTL speeds. We just don't know how to control it, like ancients couldn't control say electricity.

Before FTL, we need to get control of fusion - emitting alphas [aneutronic reactions because directing/reflecting alphas is much easier than neutrons] at 0.05c would make for comfortable colonization of the Solar system and even for the first probes/missions to the closest stars. (and fusion is not a pipe dream if you look at the right development - ie. Sandia MagLIF (fusion target inside large coin shrinker :) instead of NIF (non-starter) or ITER (for Earth based energy production only, DT at best, no aneutronic even in the wildest dream)) Fusion is also about engineering of precise energy focusing - space expansion is the next level (or 2 :) of precision and energy levels after that.