Earlier quoted context omitted.
Empedocles (c. 490–430 BC) was the first to propose a theory of light, and claimed that light has a finite speed. In 1021, Alhazen (Ibn al-Haytham) published his Book of Optics, in which he presented a series of arguments dismissing Empedocles emission theory of vision in favour of the now accepted intromission theory, in which light moves from an object into the eye. This led Alhazen to propose that light must have…
>the modern origin of Relativity is rooted in Poincaré's work, And Poincare never developed it from first principles, elevating the speed of light being fixed in all frames. Poincare only noted that this was a solution to Lorentz invariance. Einstein did take this as a first principle, and demonstrated what follows: time dilation (something completely alien to all before him, including Galileo). He then derived E=mc^…
No, not so much.
You missed this in my GP comment: "Hendrik Lorentz proposed that the motion of the apparatus through the aether may cause the apparatus to contract along its length in the direction of motion, and he further assumed, that the time variable for moving systems must also be changed accordingly ("local time"), which led to the formulation of the Lorentz transformation."