Russellian panpsychism, the view that concrete reality is entirely physical and fundamental physical entities are intrinsically experiential, is faced with the combination problem – the challenge of explaining how the experiences of microphysical entities combine to form the experiences of macro-physical entities such as humans. While such combination is deemed impossible by critics of panpsychism, a ‘Leibnizian’ response to the problem – that microphysical (and micro-experiential) entities never combine – has received little attention. This paper seeks to evaluate the viability (...) of such a Leibnizian panpsychism. After motivating the view, we outline and respond to two kinds of objections a critic of the view might have: (a) mereological nihilism, the view that individuals never combine, is an unviable position independent of panpsychism, (b) Leibnizian panpsychism entails the unacceptable view that human experiences are physical simples. We argue that both sets of objections can be addressed, and that Leibnizian panpsychism ought to be taken more seriously as a metaphysics of consciousness. (shrink)