Bernard J. Carr and Stephen W. Hawking discuss black holes in the early universe. They suggest that the early universe was inhomogeneous and possibly chaotic, which could have led to regions the size of the particle horizon undergoing gravitational collapse, forming black holes with initial masses ranging from 10^-5 grams upwards. These black holes would grow through accretion due to radiation pressure in the early universe. However, this accretion would not be significant unless the initial conditions of the universe were specially arranged and causal. Observations indicate that only a small fraction of the matter in the early universe could have undergone gravitational collapse. The study is to be published.Bernard J. Carr and Stephen W. Hawking discuss black holes in the early universe. They suggest that the early universe was inhomogeneous and possibly chaotic, which could have led to regions the size of the particle horizon undergoing gravitational collapse, forming black holes with initial masses ranging from 10^-5 grams upwards. These black holes would grow through accretion due to radiation pressure in the early universe. However, this accretion would not be significant unless the initial conditions of the universe were specially arranged and causal. Observations indicate that only a small fraction of the matter in the early universe could have undergone gravitational collapse. The study is to be published.