UN-era state-boundary stability crushed secession bids but aided internal revolutions.

Evidence

Except for decolonization, great powers and their agent, the United Nations, have resisted alterations of state boundaries with unprecedented tenacity and effectiveness. As a consequence, secessionist and irredentist movements have seen their chances of success plummet, but a revolutionary coalition that established military superiority within an existing state’s territory faced increasing prospects of external recognition, financial aid, and international help with postwar reconstruction. — Charles Tilly, Regimes and Repertoires, 1090

Categorization

• corroborated: 2 independent passages support this claim — Charles Tilly, Regimes and Repertoires, 1090
• XREF: connects to: Revolutions happen when governmental weakness unblocks pressures, not when they are blocked; Revolution happens when state barriers to pressure are removed, not blocked. — John T. Jost and Jim Sidanius, Political Psychology: Key Readings, 4306

Broader Connections

• Revolution happens when state barriers to pressure are removed, not blocked. #expands (0.80) — John T. Jost and Jim Sidanius, Political Psychology, 4306
• Revolutions happen when governmental weakness unblocks pressures, not when they are blocked #expands (0.78)