Romans indeed attributes all authorities as being permitted by God to be in power. We do have the ability to impact our governance. Queen Esther went and pleaded with the King--she was born 'for such a time as this.'
God does give free-will choice and personal responsibility. In Proverbs is the passage, "When the righteous are in power, the people rejoice, but when the wicked are in power, they groan."
The Mayflower Compact, our Declaration of Independence and our Constitution are applications of our ability to self-govern, "one nation under God."
Note that I'm not saying all 'Christians' are righteous nor that non-Christicans are all wicked, of course...the original context was Jewish.
Cheers.
One can look at the 20th century and find plenty of truth of inhumanity of man. In the days of Noe there was no limit to the wickedness of mankind. Any evil that man could conceive was being preformed.
In the fullness of time He came the first time and in the fullness of time He shall return.