Since Adam's rebellion God has dealt with all mankind in essentially the same way. We are all sinners by nature and except for the Grace of God we would all suffer the deserved consequence. God has always dealt with mankind through Covenants. That is what Scripture teaches.
I believe the concept of God dealing with mankind through seven different dispensations is nonsense. It does not come from a natural reading of Scripture but is the invention from the mind of John Nelson Darby who, in effect, claims some special revelation. I do not believe that dispensationalism is a Biblical doctrine but is just as manmade as some of the doctrines of Roman Catholicism! If Scofield has not published the SRB dispensationalism would never have prospered in this country or anywhere else. Biblically illiterate people got their hands on the SRB and thought they had some new revelation from God. The idea that Jesus Christ is going to snatch His Church out of the world is contrary to Scripture:
Matthew 16:18. And I say also unto thee, That thou art Peter, and upon this rock I will build my church; and the gates of hell shall not prevail against it.
Matthew 28:18-20
18. And Jesus came and spake unto them, saying, All power is given unto me in heaven and in earth.
19. Go ye therefore, and teach all nations, baptizing them in the name of the Father, and of the Son, and of the Holy Ghost:
20. Teaching them to observe all things whatsoever I have commanded you: and, lo, I am with you alway, even unto the end of the world. Amen.
The "end of the world" is not the so-called rapture! Furthermore, the idea that God has an earthly people and a heavenly people is clearly refuted by Revelation 21 and 22 and, I am convinced, all of Scripture!!
***************************************************************
If you are interested in more about the inventor of dispensationalism you can read the following: