社会主义阵线
Eventually, Lim gave up the struggle in prison and requested to be released. On 21 July 1969, Lim wrote two letters: one addressed to Lee Kuan Yew, and one to Lee Siew Choh. In those letters, Lim stated that he had "completely lost confidence in the international communist movement", and that "communism is not as ideal as what we think it is". In the letter, Lim also resigned from the Barisan Sosialis, marking an end to his political career.