Stanley Weintraub, in his biography of Disraeli, points out that his subject did much to advance Britain towards the 20th century, carrying one of the two great Reform Acts of the 19th despite the opposition of his Liberal rival, Gladstone. "He helped preserve constitutional monarchy by drawing the Queen out of mourning into a new symbolic national role and created the climate for what became 'Tory democracy'. He articulated an imperial role for Britain that would last into World War II and brought an intermittently self-isolated Britain into the concert of Europe."