For much of the last decade, EU enlargement looked like a project trapped between rhetoric and fatigue. That is changing. War in Ukraine, pressure on Europe’s eastern flank and growing uncertainty about the wider geopolitical order have pushed enlargement back into the category of strategic necessity rather than diplomatic aspiration.
The logic is clear. A larger EU would extend stability deeper into the continent, strengthen Europe’s geopolitical weight and reduce the gray zones that external powers exploit. Western Balkan states, Ukraine and Moldova are not just applicants; they are front lines in a contest over political alignment, security architecture and economic gravity.
But enlargement is no longer simply a matter of checking technical boxes. It raises a hard question about the kind of Union Europe wants to be. A bigger EU could mean greater reach and resilience. It could also mean more internal complexity, sharper budget battles and harder veto politics unless institutional reform keeps pace.
That tension is becoming central to Brussels’ thinking. Leaders know that indefinite delay is dangerous: it invites disillusionment in candidate countries and creates a vacuum that rivals are eager to fill. Yet speeding ahead without adjusting decision-making rules, funding mechanisms and governance structures could paralyze the Union from within.
The most important shift is psychological. Enlargement is being reframed less as charity for neighbors and more as insurance for Europe itself. If the EU wants to shape its environment rather than merely react to it, it may have to accept a larger, messier and more ambitious Union. The gamble is obvious. So is the alternative: a smaller Europe facing a bigger crisis.
