Is the U.S. constitution the longest-lived written plan for representative government in history?

Yes, the U.S. Constitution is often regarded as the longest-lived written plan for representative government in history. It was ratified in 1788 and has remained in effect with only 27 amendments, a testament to its durability and adaptability. While other countries have had constitutions, many have been rewritten or replaced multiple times, making the U.S. Constitution unique in its longevity.