Autocratic government. That is where one person reigns supreme. King John had no restrictions on his power. He was forced to sign the magna carta. That limited his power. That gave the nobles power. Their was a group of nobles that I think later formed the basis of parliament although wasnt exactly parliament.
His writings influenced Voltaire and Rousseau, but most importantly, the American revolutionaries. Thomas Jefferson used the thoughts first penned by John Locke while writing the Declaration of Independence.