Final answer:
The key difference separating Vietnam's development from that of other parts of Southeast Asia was its division into a Communist north and a capitalist south during the Cold War. This division resulted in different approaches to governance and economic systems, shaping Vietnam's development in unique ways. Other factors, such as proximity to China, geography, and historical context, also played significant roles.
Step-by-step explanation:
The key difference that separated Vietnam's development from that of other parts of Southeast Asia was its division into a Communist north and a capitalist south during the Cold War. After gaining independence in 1954, Vietnam was divided politically and ideologically. The northern region aligned with Communist ideology, while the southern region aligned with capitalism and democratic reforms.
This division resulted in different approaches to governance and economic systems, which had a significant impact on Vietnam's development. While most of Southeast Asia faced west toward India as the center of trade, culture, and religion, Vietnam's proximity to China influenced its cultural sphere and development. The country's unique geography, with distinct zones shaped by rivers and mountains, also played a role in its evolution.
Additionally, Vietnam's historical and political context, including its struggle for independence and later involvement in the Vietnam War, had significant effects on its development compared to other Southeast Asian nations.