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People seem to be healthier, happier and better adjusted -- all of those things are related to having positive relationships with siblings, you know, and a lot of that comes from this idea that you can get support and help and validation from having someone close to you who shares a history and understands the world in a similar way to you, what we don't really know is the root cause, whether it is that happier people are less depressed people and are better able to form positive relationships with siblings or having a great sibling relationship is helping people better cope with all the things that life throws at you.