 Complete the following phrase:  In addition to the legitimacy given by medieval scholarly opinion, nostalgia for the days of successful Islamic empires simmered under later Western colonialism. This nostalgia played a major role in the Islamist political ideal of Islamic state, a state in which Islamic law is preeminent. The Islamist political program is generally to be accomplished by re-shaping the governments of existing Muslim nation-states; but the means of doing this varies greatly across movements and circumstances. Many democratic Islamist movements, such as the Jamaat-e-Islami and Muslim Brotherhood have used the democratic process and focus on votes and coalition-building with other political parties. Radical Islamic movements such as the Taliban and al-Qaeda embrace militant Islamist ideology, and were prominent for being part of the anti-Soviet resistance in Afghanistan during the 1980s. Both of the aforementioned militant Islamist groups had a role to play in the 