The relation between science and society is the primary theme from the selections below. H. B. S. Haldane imagines a future where science frees humanity from the constraints of nature; Bertrand Russell sees this future as a collectivist prison of sorts. Philosophers of various stripes — whether idealist or otherwise — seek to integrate results from relativity theory into their metaphysical views about the world. Some economists seek to replicate the success of the natural sciences by overhauling classical and marginalist economics.