In the contemporary world, there are many democratic states whose minority nations have pushed for constitutional reform, greater autonomy, and asymmetric federalism. Substate national movements within countries such as Spain, Canada, Belgium, and the United Kingdom are heterogeneous: some nationalists advocate independence, others seek an autonomous special status within the state, and yet others often seek greater self-government as a constituent unit of a federation or federal system. What motivates substate nationalists to prioritize one constitutional vision over another is one of the...