For more accurate citations, please consult the original presenters. George Farre Training in particle physics, works in philosophy of physics. Big bang, etc. Symmetry of explosive. In the beginning, the energy is high and dense.
Energy density decreases asymptotically with time.
Can view as eras. Some things not stable at high energy become stable, e.g. quarks and elementary particles. Eventually, the environment is not hostile to their existence. Then, the first hierarchies appear as an emergence system, i.e. protons. Hierarchies become stable.