Tomorrow, the United Kingdom will vote on whether to leave the European Union or to remain a member. This historic ballot could fundamentally shape Britain’s future — and that of Europe as a whole.

Two unholy alliances have driven mainstream debate on the referendum. The Remain forces are dominated by the Britain Stronger in Europe coalition, which comprises a substantial chunk of the Conservative Party cohering around David Cameron and George Osborne, together with much of the Labour Party, the Liberal Democrats, and the Greens. Leading sections of British capital also back Remain.

Labour leader Jeremy Corbyn has come out clearly for Remain. But he has wisely kept his distance from the Tory-dominated coalition — his support is widely seen to be lukewarm, at best. Figures from Labour’s center and right have been most actively involved — and have looked the most comfortable — in the “Stronger In” campaign.