  Typically visualized from an independent particle viewpoint, the Pauli
principle's role in collective motion is analyzed leading to a reimagination of
the microscopic dynamics underlying superfluidity/superconductivity and a
reinterpretation of several interrelated phenomena: Cooper pairs, the Fermi
sea, and Pauli blocking. The current approach, symmetry-invariant perturbation
theory is a first principles method with no adjustable parameters. An adiabatic
evolution is employed to transfer the well-known Pauli restrictions for
identical, independent particles with two spin values to restrictions on the
collective modes of an ensemble of ``spin up'' ``spin down'' particles. The
collective modes, analytic N-body normal modes, are obtained from a group
theoretic exact solution of the first-order equations. Cooper pairing is
reinterpreted not as the pairing of two fermions with total zero momentum, but
as the convergence of the momentum of the entire ensemble to two values, +k and
-k, as the particles in the normal mode move back and forth with a single
frequency and phase. The Fermi sea and Pauli blocking, commonly described using
independent fermions that occupy lower states to create a ``sea'' in energy
space and block occupation is redescribed as a collective energy phenomena of
the entire ensemble. Superfluidity, which has always been viewed as a
collective phenomena as Cooper pairs are assumed to condense into a macroscopic
occupation of a single lowest state, is now reimagined without two-body pairing
in real space, but as a macroscopic occupation of a low-energy phonon normal
mode resulting in the convergence of the momentum to two equal and opposite
values. The expected properties of superfluidity including the rigidity of the
wave function, interactions between fermions in different pairs, convergence of
the momentum and the gap in the excitation spectrum are discussed.
