ICON’s platform is best thought of as a blockchain of blockchains. Independently-governed blockchains, that can function by their own rules, can operate on the ICON platform to work with each other. While in a Nexus (explained shortly), they will have to abide by certain rules, but they will still have governance over their individual blockchains. Think of them as independent states, with their own rules, working at a international level when they must cooperate with each other