“…The second wave took place 2 months later (May, 2022) when Russian forces had blocked Ukrainian ports, contributing to a global food security crisis, and when the EU had agreed to ban 90% of Russian oil imports by the end of the year. At each time point, we measured participants' instrumental reasons to cooperate with Russia during the war, support for the Russian invasion, imposition of incapacitative punishments to Russia (i.e., stop Russia from causing further harm; Carlsmith & Darley, 2008; Fousiani & Van Prooijen, 2022a; Kahane et al, 2018), identification with EU (i.e., sense of belonging to the EU; see Sani et al, 2015; Tajfel & Turner, 1986), and identification with the NATO, a broader superordinate social identity of Greeks. Importantly, besides the above measures that mostly assess attitudes; we included two behavioural measures in Time 2, namely opposition to the Russian–Ukraine war and support for sanctions against Russia.…”