AUTHOR=Gorochowski Thomas E. , Hauert Sabine , Kreft Jan-Ulrich , Marucci Lucia , Stillman Namid R. , Tang T.-Y. Dora , Bandiera Lucia , Bartoli Vittorio , Dixon Daniel O. R. , Fedorec Alex J. H. , Fellermann Harold , Fletcher Alexander G. , Foster Tim , Giuggioli Luca , Matyjaszkiewicz Antoni , McCormick Scott , Montes Olivas Sandra , Naylor Jonathan , Rubio Denniss Ana , Ward Daniel TITLE=Toward Engineering Biosystems With Emergent Collective Functions JOURNAL=Frontiers in Bioengineering and Biotechnology VOLUME=Volume 8 - 2020 YEAR=2020 URL=https://www.frontiersin.org/journals/bioengineering-and-biotechnology/articles/10.3389/fbioe.2020.00705 DOI=10.3389/fbioe.2020.00705 ISSN=2296-4185 ABSTRACT=Many complex behaviours in biological systems emerge from large populations of interacting molecules or cells, generating functions that go beyond the capabilities of the individual parts. Such collective phenomena are of great interest to bioengineers due to their robustness and scalability. However, engineering emergent collective functions is difficult because they arise as a consequence of complex multi-level feedback, which often spans multiple length-scales. Here, we present a perspective on how some of these challenges could be overcome by using multi-agent modelling as a design framework within synthetic biology. Using case studies covering the construction of synthetic ecologies to biological computation and synthetic cellularity, we show how multi-agent modelling can capture the core features of complex multi-scale systems and provide novel insights into the underlying mechanisms which guide emergent functionalities across scales. The ability to unravel design rules underpinning these behaviours offers a means to take synthetic biology beyond single molecules or cells and towards the creation of systems with functions that can only emerge from collectives at multiple scales.