The population of the world is greater than it has ever been, more than 7 billion people. The number of evil spirits at work in the world has not increased, since their rebellion at the beginning of human and a large number were locked up at the time of the flood. Because their number is fixed, they should now be weaker than they have ever been, as they have to spread themselves more thinly across the world.
However, they have amplified their limited authority by aligning themselves with political power. Because political power is more controlling and more widespread than it has ever been, this strategy has more than compensated them for their limited numbers. Consequently, they are probably more powerful than they have ever been. By supporting political power, we have strengthened the powers of evil, when they should be weak.