I’ve just examined the two Wikipedia articles you link to and I don’t think this is an independent discovery. The race between Einstein and Hilbert was for finding the Einstein field equations which put general relativity in a finalized form. However, the original impetus for developing general relativity was Einstein’s proposed Equivalence Principle in 1907, and in 1913 he and Grossman published the proposal that it would involve spacetime being curved (with a pseudo-Riemannian metric). Certainly after 1913 general relativity was inevitable, perhaps it was inevitable after 1907, but it still all depended on Einstein’s first ideas.
That’s a far cry from saying that these idea wouldn’t have been discovered until the 1970s, which I’m basing mainly on hearsay and I confess is much more dubious.
I’ve just examined the two Wikipedia articles you link to and I don’t think this is an independent discovery. The race between Einstein and Hilbert was for finding the Einstein field equations which put general relativity in a finalized form. However, the original impetus for developing general relativity was Einstein’s proposed Equivalence Principle in 1907, and in 1913 he and Grossman published the proposal that it would involve spacetime being curved (with a pseudo-Riemannian metric). Certainly after 1913 general relativity was inevitable, perhaps it was inevitable after 1907, but it still all depended on Einstein’s first ideas.
That’s a far cry from saying that these idea wouldn’t have been discovered until the 1970s, which I’m basing mainly on hearsay and I confess is much more dubious.