What changes for Scotland did Gordon Brown propose before the 2014 independence referendum?

Before the 2014 Scottish independence referendum, former British Prime Minister Gordon Brown emerged as a prominent advocate for maintaining the union. To address the future of Scotland within the United Kingdom, he proposed a series of significant reforms:

• Codification of Purpose: He called for a formal codification of the purpose of the United Kingdom, modeled after the U.S. Declaration of Independence.
• Constitutional Permanence: He advocated for the formal recognition of the Scottish Parliament as a permanent and indissoluble institution.
• Fiscal Devolution: He proposed granting Scotland greater income-taxing powers.
• Parliamentary Debate: He urged that a formal debate be held in the House of Commons regarding the future of the union should the referendum be defeated.

These proposals were part of his broader effort to offer a vision for a "future worth sharing," which he detailed in his 2014 book, My Scotland, Our Britain: A Future Worth Sharing.12