What was original in Einsteins SR theory ?

the two postulates of SR

1. That the speed of light is a constant in all reference frames was
actally the work of Maxwell where the quantity c appears as a constant
independent of frame of reference.

2. All inertial reference frames are similar was actually the work of
Galileo.

the gamma correction was the work of Lorentz and Fitgerald

Poincare and Fizeau also added ideas

what EXACTLY did Einstein add ?

what in SR is uniquely Einsteins ?

.

Relevant Pages

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