Consistent quantization of massless fields of any spin

Consistent quantization of massless fields of any spin is developed from first principles. Probability currents and Lagrangians are derived allowing a first quantized formalism. A simple procedure was derived of connecting the wavefunctions with potentials and gauge conditions. We emphasize the spin one and spin two cases, relating them to the quantum photon (via modified Maxwell's equations) and to the quantum graviton respectively.