In the graph the countries of the world are shown (UN member states and UN observer non-member states).
Two countries are connected if they share a land border.
Press Space or Enter to switch between Background Pan mode and Easy Highlight mode.
In Background Pan mode move around by clicking and dragging the background. It's easier to pick and drag a node in Easy Highlight mode.
Zoom with the mouse wheel any time.
Data sources: [1] [2] retrieved from Wikipedia on 20 Feb 2019. Source code is on GitHub.