[pchangr]

Plato studied “philosophy” which at the time aimed to provide a full explanation to everything in life. Later in history knowledge got more and more specialized. As time goes by, being able to do meaningful contributions to various fields becomes more difficult. It is considered for example, that Gauss was the last scientist to contribute to all branches of science and similarly John Von Neumann was the last mathematician who made meaningful contributions in all branches of sciences. So yeah, you could say for Plato there were no boundaries as the amount of knowledge that existed was small enough to be fully handled by a human .. and it’s likely not the case anymore.