Adler, Emanuel and Michael Barnett (1998). Security Communities. Cambridge, UK: Cambridge University Press. Allison, Graham (2015). ‘The Thucydides trap: are the US and China headed for war?’ The Atlantic, 24 September 2015. Ashford, Emma (2021). ‘Assumption #1: revisionist states are the cause of great-power competition’. New American Engagement Initiative Issue Brief. Atlantic Council, Scowcroft Center for Strategy and Security. Bailey, Michael A., Anton Strezhnev and Erik Voeten (2017).