High Quality Content by WIKIPEDIA articles! The Social Democratic Party of Nigeria, popularly known as SDP, was a political party created to encompass the ideals of a center left political organization. It was one of the products of a democracy project by former President Ibrahim Babangida to have two detribalized political parties, one a little to the left and one for the right. However, it was seen as a moderate party with a flavor for young radical intellectuals and socialists. In its manifesto, it called for concerted efforts to improve the people`s welfare and fight for social justice.