(i)The parliamentary system, a colonial legacy or bequeath from Britain on her former West African Colonies, could not guarantee desired political stability after independence.
(ii) The presidential system resembles the traditional Afri-can political system, as separating the offices of Heads of state and that of government is not only meaningless in 1 Africa but also difficult to achieve.
(iii) The process of decision making is quick and orderly because of the absence of opposition.
(iv)It eliminates the parliamentary collective responsibility, a requirement of all cabinet resigning because of one man's mistake,
(v) Given the mode of his election and his powers, the president is capable of instituting a strong executive that can promote at faster rate the process of nation building.
(vi) The friction and bickering that characterizes the parliamentary system as a result of the division of ceremonial and executive functions is removed.
(vii) It is easier to identify who has responsibility for certain function and who's to blame for lapses and inaction.
(viii) The need to adopt a novel system led to the presidential system of government.