The writer of Hebrews is a radical to modern ears. He seems to think that every power on earth is subjected to the authority of Jesus Christ. He is quite clear on this point: He left nothing that is not subject to him. There is no evil and no good which are not equally subjected to his authority.
The problem, as the writer points out in Hebrews 2:8, is that we do not yet see all things subjected to him. We fail to see things the way they are, but God clearly says that all things are subjected to Christ.
Even now, Christ, to whom all things are subjected, is demonstrating his power over death, the final enemy. He is delivering those who through fear of death were subject to slavery all their lives. As it is, we cannot see the subjection rightly. But God has spoken and has made it plain. When we don’t see rightly, we must learn to hear more acutely. Like Stevie Wonder or Ray Charles, we must learn to play life’s music completely by ear, hearing the reality we cannot see. In this text, we can hear the reality we fail to see: All things are subjected to Christ (even death).