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Fluid cosmologies are consistent with the generally accepted observationalevidence during intermediate and late times, and they need not have singularbehavior in primordial times. A general form for fluid cosmology consistentwith Einstein's equation is demonstrated, and a dynamic metric thatincorporates fluid scale is developed. The large scale causal structure of amulti-fluid cosmology exemplary of standard cosmology is then examined. This isdone through developing coupled rate equations for radiation, dust, and darkcomponents. The beginning of the dissolution of the primordial fluid into theother components is singularity-free, since the fluid provides a non-vanishingscale for the cosmology. Penrose diagrams are developed for cosmologies bothwith and without a final state dark energy density.

Global Structure of a Multi-Fluid Cosmology