  In this talk I will present a model for primordial galaxy formation. In
particular, I will review the feedback effects that regulate the process: (i)
radiative (i.e. ionizing and H_2-photodissociating photons) and (ii) stellar
(i.e. SN explosions) feedback produced by massive stars. I will show the
results of a model for galaxy formation and IGM reionization, which includes a
self-consistent treatment of the above feedback effects. Finally, I will
describe a Monte Carlo method for the radiative transfer of ionizing photons
through the IGM and discuss its application to the IGM reionization problem.
