Not sure how we would measure the present "poor spiritual state" with the same poor state in past eras. Even in Biblical times, you have the people of Israel who again an again and again and again lose faith and create 'false' gods to worship - yet good people still existed and the 'miracles' occurred. And consider Jesus: he was rejected by all - except a small group of disciples and followers (and many ran in his hour of need); talk about a poor spiritual state, yet for Christianity, it resulted in the greatest miracle. So too in any age, there is a mixture of those lost, those who deliberately go another way and good people. On this reckoning, if there was 'supernatural activity' in some of those ages, that activity should be present in any age. One wonders, then, if there was ever such supernatural activity as recorded in the bible.
The paradox (and the wisdom) of Christianity is that the spiritual (or God) is not found in another dimension and not found above and beyond the natural: the spiritual is not found in the super-natural. Jesus proclaims the treasure found in the beginning of his public mission: "Behold, the Kingdom of God. " The Jews and Jesus believed that God would establish his Kingdom here, 'this world' would be (become) The Kingdom of God. The paradox of Christianity is that the supernatural is in the natural; it is in the natural that one finds the 'supernatural.' For Christianity, God's is incarnate; he is only found with us (Emmanuel).