[mcarmichael]

Control was an almost completely unaddressed issue before the Wrights took it up, even though it is also crucial to useful glider development.

This video has a nice delineation of the collection of breakthroughs needed:

  https://youtu.be/EkpQAGQiv4Q?t=391

[KineticLensman]

Yes. AIUI, as bicycle riders the Wright brothers understood the need for banking in turns rather than thinking of maintaining a constant roll orientation throughout a turn