Communication is the key.
It took the ideas from many cultures, communicated together, to fuel modern 'Western' technology as it developed in Europe.
The primary source of the revolution, in my view, was the information obtained by Marco Polo from the Chinese, which he transported back to Europe and disseminated. No, not just the Chinese noodle which they made into Italian spaghetti, but the more substantive information he obtained - rocks that burn.
For a brief introduction, go to:
Until Marco Polo, no one in Europe knew that you could burn certain types of rocks, and not just wood. Marco Polo had observed the Chinese burning rocks, and was astounded. Such rocks were readily available in Europe, yet no one knew that they could burn.
He also observed the Chinese pulverizing those rocks and mixing it with other readily available chemicals (dried urine, for example), which then were used for military purposes such as to fire rockets at the enemy.
Upon taking that Chinese technology back to Europe circa 1295 A.D., it was not long before the idea that a rocket propelled projectile (bullet or cannonball) came into existence, completely revolutionizing warfare in Europe. Soon, each country strived for the latest advances, which ultimately shaped and reshaped the many countries in close proximity, which proximity allowed for a rapid communication of each new idea.