In metaphysics, Metaphysical solipsism is the variety of idealism which asserts that nothing exists externally to this one mind, and since this mind is the whole of reality then the "external world" was never anything more than an idea.
[2] Thus, believing in first-person realism and a single, unfragmented world must imply that solipsism is true.
One reason for the lack of support of this philosophical position is how strange it would be for a solipsist to preach solipsism – as if to convince everyone around them that they are purely a figment of the author's own imagination.
Russell commented, on the same theme: "As against solipsism, it is to be said, in the first place, that it is psychologically impossible to believe, and is rejected in fact even by those who mean to accept it.
I once received a letter from an eminent logician, Mrs. Christine Ladd-Franklin, saying that she was a solipsist, and was surprised that there were no others.