One reason why the constitution was adopted over the articles of confederation was

Short  The articles of confederation gave to much power to the government.

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I believe that the first answer is actually incorrect; the Articles of Confederation were changed to become what is today the Constitution of America because society was reduced to anarchy, as states' and individualist rights became too unchecked because Congress was not allotted fundamental powers such as collecting and levying taxes and so forth (the government had actually been too weak).