Editing Lee Smolin (section)

===Contributions to the philosophy of physics===
Smolin has contributed to the philosophy of physics through a series of papers and books that advocate the relational, or [[Leibnizian]], view of space and time.  Since 2006, he has collaborated with the Brazilian philosopher and Harvard Law School professor [[Roberto Mangabeira Unger]] on the issues of the reality of time and the evolution of laws; in 2014 they published a book, its two parts being written separately.<ref>Smolin L., and Roberto Mangabeira Unger R., (2014), ''The Singular Universe and the Reality of Time: A Proposal in Natural Philosophy'', Cambridge University Press, {{ISBN|978-1107074064}}</ref>

A book length exposition of Smolin's philosophical views appeared in April 2013. ''[[Time Reborn]]'' argues that physical science has made time unreal while, as Smolin insists, it is the most fundamental feature of reality: "Space may be an illusion, but time must be real" (p.&nbsp;179). An adequate description according to him would give a ''Leibnizian universe'': [[Identity of indiscernibles|indiscernibles]] would not be admitted and every difference should correspond to some other difference, as the [[principle of sufficient reason]] would have it. A few months later a more concise text was made available in a paper with the title ''Temporal Naturalism''.<ref>	Smolin L., [https://arxiv.org/abs/1310.8539 arXiv:1310.8539]</ref>