By Cavid Aga in Baku The petrostate of President Ilham Aliyev appears more impregnable than ever, and the Azerbaijani opposition more and more marginal, but a new generation of leaders are beginning to emerge with fresh ideas on how to achieve democratic change. Ahmad Mammadli, leader of the Democracy 1918 or D-18 movement, is a student activist who has turned the party in a more ideological and confrontational direction. He has also raised ethnic and gender issues that were ignored by the traditional opposition forces, and has dared to question the regime’s implacable hostility to Armenia. ‘I…