Former Tanzanian president Ali Hassan Mwinyi, who introduced multi-party democracy to the East African nation, died on Thursday aged 98, the presidency said."I extend my condolences and those of the people of Kenya to President Samia Suluhu Hassan and the people of the United Republic of Tanzania," Ruto said on X. - Multi-party democracy - Born on May 8, 1925 in the former British colony known as Tanganyika, Mwinyi moved to Zanzibar to study Islam.