{In the generations gone by} (en tais par(9369)ch(886d)enais
geneais). Perfect middle participle from paroichomai, to go
by, old verb, here alone in the N.T. {Suffered} (eiasen).
Constative aorist active indicative of ea(935c) (note syllabic
augment). Paul here touches God in history as he did just before
in creation. God's hand is on the history of all the nations
(Gentile and Jew), only with the Gentiles he withdrew the
restraints of his grace in large measure ( Ac 17:30  Ro
1:24,26,28 ), judgment enough for their sins. {To walk in their
ways} (poreuesthai tais hodois aut(936e)). Present middle
infinitive, to go on walking, with locative case without en.
This philosophy of history does not mean that God was ignorant or
unconcerned. He was biding his time in patience.