Cosmopolitanism (noun)

1. The idea or attitude of being interested in or involved with the world and its affairs.
2. The idea that all human beings belong to a single community and should live in peace and harmony.

Origin:

From the greek word "cosmos" meaning "world" and "polites" meaning "citizen".

Examples:

1. The philosopher's cosmopolitanism led him to believe that all nations should work together to achieve world peace.
2. The city's cosmopolitan atmosphere attracted people from all over the world.
3. The cosmopolitanism of the internet allows people to communicate and share ideas across borders.
4. Cosmopolitanism has been advocated by thinkers such as Immanuel Kant, who proposed the idea of a federation of free states.
5. The United Nations is an organization that embodies the principles of cosmopolitanism, by promoting international cooperation and understanding.