Theoretical models also suggest that in the early universe, vast tendrils of dark matter provided normal matter the gravitational scaffold it needed to coalesce into the first galaxies.
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Originally known as the “missing mass,” dark matter's existence was first inferred by Swiss American astronomer Fritz Zwicky, who in 1933 discovered that the mass of all the stars in the Coma cluster of galaxies provided only about 1 percent of the mass needed to keep the galaxies from escaping the cluster's
Dark matter is a hypothetical form of matter thought to account for approximately 85% of the matter in the universe. ... In the standard Lambda-CDM model of cosmology, the total mass–energy of the universe contains 5% ordinary matter and energy, 27% dark matter and 68% of a form of energy known as dark energy.
As the universe initially was only helium and hydrogen, dark matter was critical in providing the gravitational force to pull these elements together to form stars. Now that there are other objects in the galaxy, dark matter is not needed to form stars.