Among other notions, Lingua ex Machina [1] discussed possible evolutionary pathways which allowed complex language (nestable subject verb object clauses) to arise from simple language (just verb object statements).

I found that book on a lark and barely understood the content. I was tinkering with knowledge representation and semantic web stuff at the time. The utility of subject verb object clauses stuck with me and seems to come up frequently.

I'd love some ELI5's for how this paper advances our understanding.

[1] Lingua Ex Machina: Reconciling Darwin and Chomsky with the Human Brain [2001] https://www.goodreads.com/book/show/252045.Lingua_Ex_Machina