Book excerpt: The Commonwealth at the Summit: Volume 4 brings together the full text of declarations, statements and communiqués issued by Commonwealth Heads of Government between 2007 and 2015. Together these demonstrate the continuing evolution of a shared global vision of the Commonwealth and its consolidation as a values-based organisation, including the watershed decision to adopt the Commonwealth Charter at Perth in 2011. This volume continues a series reaching as far back as 1944, and brings up to date an impressive and inspiring record of solidarity in international cooperation, building on the unique diversity of the Commonwealth.