There will be people who specialize in something and people who are jack of all trades, but sometimes you have jack of all trades who are capable of recognizing the vast interconnectedness of various specialization and attempt to make a point of enlightening others but since this concept is relatively complicated for masses to grasp these jack of all trades are ignored or forgotten because their idea is not as profound or poignant as specialists who typically can produce more immediate results. The net effect is a gradual growth toward a singular moment, when specialists finally realize that their niches and individual lines of thought do tend to be interconnected and their exists an interplay of their specific ideas within other disciplines, much like a thread is twisted into a braid which is twisted into stronger rope.
To use a non-specific historical example, imagine a king who conquers all the lands in his region and defeats his enemies. Ultimately, the king dies and his well groomed heir is a good administrator but realizes that there are enemies beyond his conquered territories, if he is a smart king, he learns how to be a great general in battle as well as a great administrator, otherwise he turns to a strong general or is deposed. If he becomes a great general, he defeats the outsiders and the unity of the empire remains; if he turns to a strong general or fails at all to resist marauders, he either is overwhelmed by the invaders or deposed by the general because of the general’s might and hero status. If he is an exceptionally good king and has a son to succeed him, he will teach him the value of the lessons he learned and his son will be a good general and administrator but perhaps all this wars have strained the economy and money is tight and the citizens become disgruntled under heavy taxes, a truly great king might learn the value of trade and diplomacy with neighboring nations, herein lies a troublesome hurdle because it requires that the neighboring kings are friendly and wish to trade rather than conquer, but for arguments sake we will assume that it is a more modern era and warfare has become a means of last resort for other civilized nations… etc, eventually the best kings become masters of all disciplines, ideally being able to handle all problems which may arise and capable of looking for answers to new unexpected ones.
This is the way science and culture and society must and eventually, will evolve, because life is a grand experiment, history has taught us as much. The Roman Empire rose and fell as did the Empires of Genghis Kahn, the Chinese, the British, even our own American “empire”, we have learned that if an experiment fails, whether its be because of war, disease or a more gradual decline, there is always another group or individual waiting in the wings to pick up where the others failed.