  If our universe is asymptotic to a de Sitter space, it should be closed with
curvature in $O(\Lambda)$ in view of dS special relativity. Conversely, its
evolution can fix on Beltrami systems of inertia in the dS-space without
Einstein's `argument in a circle'. Gravity should be local dS-invariant based
on localization of the principle of inertia.
