It is based on the sovereign equality of all its members.
All members are to fulfill in good faith their charter obligations.
They are to settle their international disputes by peaceful means and without endangering international peace & security, & justice.
They are to refrain from the threat or use of force against any other state.
They are to give the United Nations every assistance in any action it takes in accordance with the charter.
Nothing in the charter is to authorize the United Nations to intervene in matters which are essentially within the domestic jurisdiction of any state.