"oikoumene" = inhabited earth.
(Greek - οἰκουμένη = "inhabited earth)." This passage is noteworthy as defining the usual N.T. use of oikoumene as the sphere of Roman rule at its greatest extent, that is, of the great Gentile world-monarchies Daniel 2:7 . That part of the earth is therefore peculiarly the sphere of prophecy.
In this respect, too, Jesus is superior to the angels. The phrase "concerning which we are speaking" indicates that the writer was resuming his exposition and continuing his thought from Hebrews 1:5-14. [source][source][source]
Hebrews 2:1-9 - The Author Of Our Salvation
Drifting away, Hebrews 2:1-4. The r.v. gives this solemn rendering. Unless we watch, the strong currents of the world will drift us away from God's great harbor of Salvation; and sins against His offered love are even more to be dreaded than those under the ancient Law. To neglect is the equivalent of to reject. Notice in Hebrews 2:4 how God co-operates with His messengers. See John 15:27; Acts 5:32.
Jesus crowned, Hebrews 2:5-9. How can Jesus be greater than angels? He did for man what they could not do. It is through His death that humanity may be lifted to a supreme position in the universe of being. Man failed to realize his original Magna Charta in Genesis 1:26; but the divine purpose could not be frustrated, and there was a needs-be for the manger, the Cross and the Ascension mount. As we look around, Psalms 8:1-9 seems a mockery; as we look up, we discover in Jesus the psalmist's dream more than realized. They who are one with Him will share His glory and honor. [source]
Chapter Summary: Hebrews 2
1We ought to be obedient to Christ Jesus; 5and that because he condescended to take our nature upon himself; 14as it was necessary
What do the individual words in Hebrews 2:5 mean?
Notforto angelsdid He subjecttheworldthatis comingofwhichwe are speaking