Unfortunately, a lot of technical leaps are due to investment in wars - space exploration is a direct consequence of the German investment in ballistic weaponry, aircraft development enjoyed major advancements before (during the arms race) and during WW2, all nuclear sciences were a direct consequence of the investment on all sides to create atomic weapons... it would be fantastic if we could have teh same technological leaps without the conflicts, but if it wasn't for the war's, I doubt humankind would invest in technology - especially in today's society where the betterment of humankind is never at the forefront. Today, its all about personal gain, and the "here and now", not the future.
Humankind needs to get its collective head out of its arse and look beyond to what we could achieve, if only we have the courage to invest, support and nurture initiatives like the ISS.