After many stories of a very different kind, the Quanta Magazine finally published a story about some exciting work done by top theoretical physicists based on some precious and ambitious old ideas:
Her story also boasts this periodic animated GIF with 16 frames which is cool by itself.
Werner Heisenberg really started the story in 1943 when he introduced the S-matrix – the evolution operator from the "minus infinite time" to the "plus infinite time" (within the framework of quantum field theory that Pauli, Jordan, himself, and others began to construct in the late 1920s and early 1930s) and conjectured that the right form of the S-matrix could follow from consistency conditions and nothing else. When lots of messy hadrons began to be discovered in the 1960s (and perhaps already in the 1950s – some of his quotes were "backdated" so it's not easy to give time stamps to every piece of this history), Heisenberg also conjectured that the consistency would dictate the properties of all particles and all of them would be some compromise between elementary and composite particles. By this belief, Heisenberg stood against a major industry in these two decades that was dedicated to the identification which particles were elementary and which were composite.
What he said about uniqueness couldn't be quite true because we know numerous theories – and their inequivalent S-matrices – which seem perfectly consistent so some conditions have to be added. But the idea was out.