The Sierra Club, with over 700,000 members nationwide, is the oldest grassroots environmental organization in the United States. It sees its purpose as preservation, protection, and enhancement of the natural environment.
Article IV, Section 4. This section is called the Guarantee Clause, because by its terms the federal government makes certain guarantees to the states. One of theseâprotection from foreign invasionâcontinued Congress's prior obligation under the Articles of Confederation.
Article IV of the Constitution of the United States guarantees a Republican form of government to each state. In a few places, a direct democracy exists, at times. This is most famously the case in the Town Meetings held annually by small towns, but not cities, in New England.