Spearheading the New Culture Movement (新文化运动): In the 1910s, China was in a state of crisis after the fall of the last dynasty. Chen Duxiu founded the highly influential magazine New Youth (《新青年》). This magazine became the primary platform for attacking traditional Confucianism, which he blamed for China's weakness. He famously advocated for welcoming “Mr. Democracy” (德先生) and “Mr. Science” (赛先生) from the West to build a new, strong China.
Father of the May Fourth Movement (五四运动): The ideas published in New Youth directly inspired the students and intellectuals who led the May Fourth Movement protests in 1919. While not a direct organizer of the street protests, he was the movement's undisputed intellectual father.
Founding the CCP: Inspired by the Russian Revolution, Chen Duxiu, along with Li Dazhao, formally co-founded the Chinese Communist Party (CCP) in 1921 and was elected its first leader. This marks his dramatic shift from a Western-style liberal to a committed Marxist-Leninist.
A Contentious Legacy: Chen's leadership of the CCP was short-lived. He was blamed for the party's disastrous alliance with the Nationalists (KMT) and was expelled in 1929. He later became a supporter of Leon Trotsky. This part of his life is often downplayed in official Chinese history but is crucial to understanding him as an independent thinker who refused to bow to party-line politics, whether from Moscow's Comintern or his own successors.
Comparison to Western Culture: Think of Chen Duxiu as a blend of Thomas Paine and Leon Trotsky. Like Paine, he was a master propagandist whose writings (New Youth) ignited a revolution of ideas. Like Trotsky, he was a brilliant revolutionary theorist who helped lead a communist party to prominence, only to be purged and vilified by it after a power struggle. This highlights his journey from a champion of broad enlightenment to a dedicated, and ultimately exiled, party revolutionary.