  Classically encountered problem of acceleration runaway in radiative motion
of a charged-particle is addressed by considering the criterion of minimum
radiation loss under optimum displacement in variationally referred dynamic
course in between a pair of arbitrarily selected space-like surfaces having
time-like separation. Using the criterion, analysis made by involving a family
of infinitesimally differed paths reveals that for attaining stationary action
of the dynamic course it is necessary to involve orchestrated displacement of
the path family. Dynamics that generally follows from such analysis involves
nonlocally mediated interaction besides the conventional ones. Amidst external
field perturbation it is shown that ubiquitous nonlocal mediation incessantly
attempts optimizing displacement in accomplishing minimum radiation loss. The
mediation involves virtual exchange of quantized energy and momentum of the
interacting field and particle, which in conformity with quantum mechanical
prescription is describable by unitary evolution. Under increasingly high
perturbation, the mediation can boost its defensive effort but up to a critical
limit with stress release predominantly as Larmor radiation relaxation.
Observable acceleration and jerk, and relaxations thereof in the nonstationary
evolution are indeed markers of the defense failure. Recoil from the Larmor
relaxation impedes kinetic energy growth and also imparts shear stress to the
spherically polarized vacuum field of point charge; the transverse stress
release having similitude of Hawking-Unruh radiation. Defending nonlocal field
restrains acceleration runaway and loss of causality. The classically based
ab-initio analysis on nonlocal realisms further proves its versatility in
revealing nonlocally mediated geodesics structure of quantized 4-space with
useful revelations.
