Most of the papers in the volume deal with the two grand developmental trends of human language: diachrony, the communal enterprise directly responsible for fashioning synchronic morpho-syntax; and ontogeny, the individual endeavor directly responsible for the acquisition of competent grammatical performance. The genesis of syntactic complexity along these two developmental trends is considered alongside with the cognition and neurology of grammar and of syntactic complexity, and the evolutionary relevance of diachrony, ontogeny and pidginization is argued on general bio-evolutionary grounds. Lastly, several of the contributions to the volume suggest that recursive embedding is not in itself an adaptive target, but rather the by-product of two distinct adaptive gambits: the recruitment of conjoined clauses as modal operators on other clauses and the subsequent condensation of paratactic into syntactic structures.