  Based on the Effective Field Theory (EFT) of cosmological perturbations, we
explicitly clarify the pathology in nonsingular cubic Galileon models and show
how to cure it in EFT with new insights into this issue. With the least set of
EFT operators that are capable to avoid instabilities in nonsingular
cosmologies, we construct a nonsingular model dubbed the Genesis-inflation
model, in which a slowly expanding phase (namely, Genesis) with increasing
energy density is followed by slow-roll inflation. The spectrum of the
primordial perturbation may be simulated numerically, which shows itself a
large-scale cutoff, as the large-scale anomalies in CMB might be a hint for.
