Unrelated, but maybe you mean special relativity. Poincaré was very close and ot...

Unrelated, but maybe you mean special relativity. Poincaré was very close and others like Lorentz would have made the logical leap to discover special relativity. Most scientists however agree that GR would have taken much longer for someone to fill in the crucial gap of modeling gravity as the geometry of space time.

But sooner or later someone would have done it.