The event that led to the establishment of the Commonwealth of Nations following World War I was the British Empire's transformation. After the war, former colonies sought independence and self-governance, leading to a reevaluation of colonial relationships. The Statute of Westminster in 1931 marked a significant step, granting legislative independence to self-governing dominions. The Commonwealth evolved from this desire for cooperation among member nations, fostering mutual respect and support, while emphasizing shared values such as democracy, human rights, and cultural exchange, ultimately reshaping international relations.