The parallel between 1787 and 1948 is naturally not exact. Even if it were, 1787 would have no authority over 1948. Each age must make or keep its own government and determine its own future. Nor do those citizens of the world who In 1948 desire to see a federal world government created assume that the process would have to follow the example of the United States of 1787 in the details of the new government. The Federal Convention did not follow any single example. Neither should a General Conference of the United Nations be expected to.
Preface - The Great Rehearsal (1948)