What if the Congress of Vienna had gone differently?

The great powers redraw Europe and agree to manage it together to prevent another Napoleon.

If it had gone differently: No concert of powers forms; 19th-century Europe lurches from war to war with nothing holding the peace.

1. 1848The Revolutions of 1848, The demands for constitutions and nations are never even rehearsed; the old monarchies feel no pressure to bend.
2. 1871German unification, Central Europe stays a cluster of middle powers; the balance that broke in 1914 never assembles.