human
Why did the Concert of Europe gain a lot of support?
assistant
The Concert of Europe gained a lot of support because most European monarchs did not wish to offend the Tsar by refusing to sign it, and as it bound monarchs personally rather than their governments, it was easy to ignore once signed. Only three notable princes did not sign: Pope Pius VII (it was not Catholic enough), Sultan Mahmud II of the Ottoman Empire, and the British Prince Regent because his government did not wish to pledge itself to the policing of continental Europe. In the opinion of Lord