Why did world let china annex the Tibet?

The world largely allowed China to annex Tibet in 1950 due to a combination of geopolitical factors, including the aftermath of World War II and the onset of the Cold War, which shifted global focus toward larger superpowers and their spheres of influence. Many countries were hesitant to confront China directly, fearing the repercussions of antagonizing a major communist power. Additionally, the lack of robust international mechanisms for protecting smaller nations from such annexations contributed to Tibet's situation being overlooked. Despite ongoing advocacy for Tibetan autonomy and human rights, geopolitical interests often took precedence over the plight of Tibetans.