A strong chain isn't enough to generate success though, and you could argue it is the least important part of success. In order for a chain to be useful it needs to pull something, a chain without something to pull is useless. And that thing the chain is pulling could be argued to be the root cause of success, while any part of the chain not capable of bearing the pull would be a root cause of failure.

Making a strong chain is easy, finding a use-case for a strong chain is much harder. It doesn't matter how strong the chain is if there is nobody there who can pull it. And if you have a good use case and a person to pull it you can just get a standard chain, few fail because they failed to get a standard chain.