Preamble
We the peoples of the United Nations determined to save succeeding generations from the scourge of war... (full preamble text here).
Chapter I: Purposes and Principles
Article 1: The Purposes of the United Nations are... (full article text here).
Article 2: The Organization and its Members, in pursuit of the Purposes stated in Article 1, shall act in accordance with the following Principles... (full article text here).
Chapter II: Membership
Article 3: The original Members of the United Nations shall be the states which... (full article text here).
Chapter III: Organs
Article 7: There are established as principal organs of the United Nations... (full article text here).
Chapter IV: The General Assembly
Article 9: The General Assembly shall consist of all the Members of the United Nations... (full article text here).
Chapter V: The Security Council
Article 23: The Security Council shall consist of fifteen Members of the United Nations... (full article text here).