For example, it has been stated that "If we have to take any single individual as the originator of the quest for a unified theory of physics, and, by implication, the whole of knowledge, it has to be Newton.
"[6] Physicist Steven Weinberg stated that "It is with Isaac Newton that the modern dream of a final theory really begins".
It brought together the understandings of the observable phenomena of magnetism, electricity and light (and more broadly, the spectrum of electromagnetic radiation).
[9] This was followed in the 20th century by Albert Einstein's unification of space and time, and of mass and energy through his theory of special relativity.
This process of "unifying" forces continues today, with the ultimate goal of finding a theory of everything – it remains perhaps the most prominent of the unsolved problems in physics.