February 24, 2022, is likely to engrave itself on the history template of the contemporary world. Russia’s unprovoked, unjustified and barbaric invasion of Ukraine is not only a manifestation of a huge security danger that has shattered peace in Europe. More structurally, it has broken the entire security architecture built patiently on the continent over many decades, including international commitments agreed in the last 30 years. As the top UK general recently observed, it is dangerous to assume that the war on Ukraine is a limited conflict. This could be “our 1937 moment“, and everything possible must be done in order to stop territorial expansion by force, thereby averting a war similar to the one that ravaged Europe 80 years ago. Mobilising our resources must start today.