Sudan has a troubled history and has been in almost constant turmoil since the 1950s. Regime change, coups, street protests, famine, war, political division - and in April 2019, the toppling of President Omar al-Bashir. The history of modern Sudan is punctuated by several coups, including in 1989, the seizing of power by al-Bashir, whose regime would last for three decades. In the background was Hassan al-Turabi, the power behind the leadership, and the man many call the architect of modern Sudan. "Al-Turabi was a successful politician, not in the sense of political achievements on the ground but in his capacity for mass mobilisation, creating an organisational structure and ensuring continuity," says Dr Al Nour Ahmed, a researcher, academic and Sudanese opposition member. "No politician had ever created a cohesive organisational body in Sudan as al-Turabi did." Al-Turabi was enigmatic, a learned Islamic scholar, the founder of Sudan's religious political party and an arch-politician. His followers revered him as a scholar, diplomat, spiritual leader and strategic thinker, with an uncanny knack of backing winners. "Thanks to his quite diverse experience, he combined traditional Islamic culture with modern European thinking," says political analyst Dr Mohamed Mokhtar al-Shanqity. But to his many enemies, he was Machiavellian, ruthlessly ambitious and sought power on his own terms. "Al-Turabi was known for his intellectual and political flexibility. Political shrewdness is one of his greatest strengths and at the same time one of his major weaknesses," al-Shanqity says. As al-Bashir's attorney-general, al-Turabi was at the heart of power and also at the centre of Sudan's religious ideologues who controlled the executive, the military and the judiciary. When al-Turabi set up a General Assembly to discuss a worldwide Islamic revolution, he attracted people like Osama bin Laden who, as a then-Saudi entrepreneur, set up businesses in Suda