Republicanism; the path for returning from constitutionalism to Dictatorship

Shortly after the 1921 coup by Seyyed Zia Tabatabai and Reza Khan Mirpanj the idea of capturing all the power was shaped in the mind of Reza Khan. Reza Khan knew the British viewpoint for abdicating Ahmad Shah and supporting another person for taking the power. So, his first plan for abdicating Qadjars was establishing a republic using nationalist slogans. Power transfer from Qadjars to Pahlavi in the framework of royal government was impossible since the Qadjars were legitimate in Constitution of 1906. So, they planned for a republic which could be a good way to finish kingship. Thus, the constitutionalism would lose its meaning and republic would become a path for returning to the dictatorship before the Constitutional Revolution.