Editing Eternal return (section)

===Precursors===
The discovery of the [[laws of thermodynamics]] in the 19th century restarted the debate among scientists and philosophers about the ultimate fate of the universe, which brought in its train many questions about the nature of time.<ref>{{cite journal |last=D'Iorio |first=Paolo |date=2014 |url=https://lexicon.cnr.it/ojs/index.php/LP/article/view/414/338 |title=The Eternal Return: Genesis and Interpretation |journal=Lexicon Philosophicum |issue=2 |doi=10.19283/lph-20142.414 |pages=66–67}}</ref> [[Eduard von Hartmann]] argued that the universe's final state would be identical to the state in which it had begun; [[Eugen Dühring]] rejected this idea, claiming that it carried with it the necessary consequence that the universe would begin again, and that the same forms would repeat themselves eternally, a doctrine which Dühring viewed as dangerously pessimistic.<ref>{{harvnb|D'Iorio|2014|pages=68–74}}</ref> {{ill|Johann Gustav Vogt|de}}, on the other hand, argued in favour of a cyclical system, additionally positing the spatial co-existence of an infinite number of identical worlds.<ref>{{harvnb|D'Iorio|2014|page=42–43}}</ref> [[Louis Auguste Blanqui]] similarly claimed that in an infinite universe, every possible combination of forms must repeat itself eternally across both time and space.<ref>{{cite web |url=https://blanqui.kingston.ac.uk/texts/eternity-by-the-stars-1872/ |title=Eternity by the Stars (1872) |website=The Blanqui Archive}}</ref>