Summary:

• O stars dissipate lower mass GMCs, preventing them from forming globulars.

• Large masses/densities are required to overcome the high temperature effects of O stars.

• Low metallicity globulars can be formed in deep potential wells of dwarf galaxies: likely source of old halo population.

• High-metallicity globulars have been seen and modeled forming in galaxy merger events (possibly gas pileup, as well).

• Globulars may form a continuum from young to old, with relaxation playing the primary role in bimodality of luminosity function.