 But the fortunes of neutral monism are no longer exclusively tied to the fate of traditional neutral monism. The neutral monist strand within the broader movement of Russellian monism (see section  5.5  above) is a promising new development. Despite invoking Russell’s name, these versions of neutral monism explore fresh ideas that hold out hope for a new life for neutral monism. And some contemporary attempts to revive neutral monism are free of any ties to the traditional versions of the doctrine. Thomas Nagel’s recent defense of neutral monism comes to mind (see section  5.4).  And the idea to make abstract entities—information, structure, computation, mathematical reality—into the neutral basis of a metaphysical system is being actively developed by philosophers and scientists alike (see section  5.1).