The single most important reason is so that people will take you seriously. That is... assuming you -want- to be taken seriously.
In constitutional amendments, the single subject style of proposing amendment is mostly applied. Where several subjects are massed together in one legislative measure the ratifying state legislatures are prone to applying the item veto to signify their preferences in any such constitution amendment proposal. And where an item veto is applied to any matter in that proposal by a ratifying state legislature, the entire measure fails.
Money and other benefits
American politics has always been dominated by two partiesStructural factors in the political system (especially single-member district voting) favor a two-party (rather than multiparty) system
it's not a single paper
The US Constitution did not split up. It is a single document.
It's not a single document
Constitution can be classified as written or unwritten, rigid or flexible, federal or unitary, and supreme or subordinate. Written constitutions are explicitly outlined in a single document, while unwritten constitutions are not codified. Rigid constitutions are difficult to amend, while flexible ones can be easily changed. Federal constitutions establish a division of powers between central and regional governments, whereas unitary constitutions centralize power. Finally, a constitution is supreme when it is recognized as the highest source of law, whereas subordinate constitutions derive their authority from higher laws or documents.
The Georgia Constitution created a single-branch legislature.
Classifications of ConstitutionsA fundamental classification is codification or lack of codification. A codified constitution is one that is contained in a single document, which is the single source of constitutional law in a state. An uncodified constitution is one that is not contained in a single document, consisting of several different sources, which may be written or unwritten.Homeopathic TreatmentsThe "classification of constitution" is also a Chinese term for classifying the various aspects of the human constitution (such as the nervous system or metabolism) for homeopathic remediation.(see related link)
war (poor gov't)
fertile soil and irrigation systems.