Due to multidisciplinary nature of the issues raised, there is also the prospect of a unified social constructivist account of mathematics. The aim of this section is to propose an overall social constructivist theory of mathematics, incorporating its philosophy, history, sociology and psychology. These are distinct disciplines, with different questions, methodologies and data. What is proposed is an overarching social constructivist meta-theory of mathematics, to provide schematic explanations treating the issues and processes in each of these fields, to be developed to suit the characteristics and constraints of that field.