Cultural history (Neo-Sufism, Religiosity), Africa in general (Sudan), Europe in general (Islam in Europe, Neo-Sufism), Islam (Islam and Muslims in Europe, Islamism, Modernization and reform, Sufism), Meeting of cultures (Islam and the West), Middle East in general (Arab world, Iran, Israel, Turkey), Mysticism and spirituality (Sufism, Traditionalism), Other countries (Malaysia, Singapore), Religion and politics (Eurasianism, Islam), Religious movements (Neo-Sufism, New religious movements, Typology), Security (Islamism, Middle East, Religion and terrorism)