I found a pre-existing question for this topic here, but I am still not clear on the answer so I am asking the question in a slightly different way:
Is Ethereum a single blockchain, or a framework for building blockchains?
I am still learning all about blockchain and my understanding is that the biggest value proposition is that I can make transactions with anyone else in the world, but I assume that this needs to occur on the public block-chain which is why I am confused; why would anyone want a private blockchain? Is it the goal of Ethereum to create a single blockchain, or is the magic more in the fact that it is a framework for creating private blockchains?
Thanks in advance!