+This section provides an honorable mention to [UN Observers](/wiki/UN_Observer), entities that participate in the [United Nations](/wiki/United_Nations) without full membership. The [Vatican](/wiki/Vatican) (Holy See) became the first non-member permanent observer state in 1964. [Palestine](/wiki/Palestine) is a more recent addition, having gained non-member observer state status in 2012.
+This list chronicles nations joining the [United Nations](/wiki/United_Nations), ordered by their date of entry. It traces the evolving landscape of global cooperation, from the foundational [Member States](/wiki/Member_States) to the most recent additions.