The Darwin vs Wallace example is completely different from the Newton vs Leibniz.
In both cases, neither stole ideas from the other. However, at least my understanding, is that Newton and Leibniz did the work at the same time, but because Newton already had a reputation, Newton took all the credit. In the case of Darwin vs Wallace instead, Darwin had years and years of research, notes, and writings done but unpublished, but he rushed to publish when he heard that Wallace had similar ideas. So in a sense, Darwin didn't walk away with more credit than he deserved, as he was there first anyway. Newton vs Leibniz doesn't look as clear cut.
(By the way, in before Edison vs Tesla, that's yet another entirely different situation of plain exploiting and stealing of Tesla by Edison)
I don't know if it is that different. Darwin and Wallace still came up with the same radical theory within decades of one another, quite a coincidence. The natural explanation is that the theory was a result of other human developments making their observations possible.
I agree. For reference, the underlying cause of the Darwin and Wallace coincidence was the establishment of modern geology by Hutton (which established the earth was old and naturally mutable), along with the large-scale collection of biological observations by naturalists such as Darwin and Wallace.
Fun unrelated Darwin fact: he's the person who figured out the geology of how and why coral reefs and atolls form where they do.
In both cases, neither stole ideas from the other. However, at least my understanding, is that Newton and Leibniz did the work at the same time, but because Newton already had a reputation, Newton took all the credit. In the case of Darwin vs Wallace instead, Darwin had years and years of research, notes, and writings done but unpublished, but he rushed to publish when he heard that Wallace had similar ideas. So in a sense, Darwin didn't walk away with more credit than he deserved, as he was there first anyway. Newton vs Leibniz doesn't look as clear cut.
(By the way, in before Edison vs Tesla, that's yet another entirely different situation of plain exploiting and stealing of Tesla by Edison)