Episode 11 -- Abandonment to Divine Providence BK 1 ch 2.1 -- The Divine Action Works Unceasingly for Souls

Is God's activity involved with every event in history? 

Yes, God's providence extends as far as his causality, St Thomas tells us. All things are held in being by God. All things act through his enabled them to act. There is nothing that happens that God does not in some way allow. He is not the cause of sin. But he allows such things to bring some great good out of the evil.