Samahang Demokratiko ng Kabataan

The reasons for SDK breaking away from KM in 1968 centered on a greater emphasis on member education, and allowing members to show more initiative. As a result, it attracted many writers and artists among its ranks. Aside from the warm bodies the organization brought to the beleaguered anti-Marcos movement, SDK's made major contributions to the National Democracy movement, and ultimately the Philippines' Socialist Movement, through well-written papers on revolutionary theory, including “The University as a Base of the Cultural Revolution,” “The Orientation of the Filipino Youth Movement,” and "Hinggil sa Legal na Pakikibaka" ("On The Legal Struggle"). It was because of the influence of "Hinggil sa Legal na Pakikibaka" that the early mass organizations of the National Democracy movement, including KM and SDK, were eventually dissolved in mid-1975, as the movement decided to focus instead on other organizational forms.

With the successful ouster of Ferdinand Marcos, many former members of the SDK eventually chose to serve in various ways in Philippine Government and society, with some retaining their advocacy of National Democracy, while others have moved away from that ideology.