Masyumi Party
Throughout this period, Yusril became close with his lecturer, Professor Osman Raliby. In turn, Osman would introduce Yusril to his political hero, Mohammad Natsir. Natsir was an Islamist politician, former Prime Minister of Indonesia, and Chairman of the Masyumi Party, a major Muslim Party that had rivalled Indonesian Communist Party (PKI) in the 1950s.