Our universe, the sum of everything that exists in the cosmos, including time and space itself.
The Universe: our universe.
The Developed World (the developed world).
The Industrialized World (the industrialized world).
The Third World (the third world).
The First World (the first world).
Existence.
The Fourth World (the fourth world).
Earth: the Earth (our earth).
The Second World (the second world).
The Developing World (the developing world).