  We have proposed an alternative model for the formation of our solar system
that does not predict any mean-motion resonant interactions, planetary
migrations, or self-gravitating instabilities in the very early isothermal
solar nebula and before the protosun has formed. Within this context of
nonviolent protoplanetary evolution over more than 10 million years, we examine
some conundrums and constraints that have been discovered from studies of small
bodies in the present-day solar system (Jupiter and Neptune's Trojans and their
differences from Kuiper belt objects, the irregular satellites of gaseous
giants, the stability of the main asteroid belt, and the Late Heavy
Bombardment). These issues that have caused substantial difficulties to models
of violent formation do not appear to be problematic for the alternative model,
and the reason is the complete lack of violent events during the evolution of
protoplanets.
