Dennis Sciama was a British physicist and father of the field of cosmology who wrote Modern Cosmology and The Unity of the Universe.

Quotes by Dennis Sciama in Time One

[T]here are subtler difficulties that arise when we go over from considering the Universe simply as a very large system to considering it as the totality of what exists.

[W]e seek a theory which describes all that actually happens, and nothing that does not, a theory in which everything which is not forbidden is compulsory.

All one can say is that if the Universe was originally uniform then the small irregularities that arise from statistical fluctuations would not develop into galaxies in the time available.