The Definition of fundamental... (as stated by Dictionary.com) serving as, or being an essential part of, a foundation or basis; basic; underlying: fundamental principles; the fundamental structure. Polygamy or Plural marriage is not an essential part for being saved, Exaltation or Salvation. Polygamy was not found in every dispensation. However, it is necessary for the Restoration of the Fullness of times. Every aspect of the gospel in every disputation was Restored to the Prophet Joseph Smith. In order to be a true Restoration in had to include everything before it, even Polygamy. That did not mean that it had to remain an implemented part of the Restoration, jut that it was an part of the puzzle so to speak and if it was missing the Restoration would have been incomplete and thus invalid. Remember that the Fundamental Principles are... God is our Father and loves each of us. Jesus Christ is our older brother and Savior. Jesus Died for all men and returned again on the third day... he concord Death so that all may live again after physical death. The Atonement of our savior makes it possible for us to repent and be clean... conquer spiritual death and making it possible for us to return to our Father in Heaven. Prophets have serve as a mouth peace on earth. A means for the will of God to be communicated to us on Earth. Joseph smith is a prophet in our day and was called my God the Father and Jesus Christ to be the Prophet of the Restoration. That all keys, rights and responsibilities of all previous dispensations were confirmed upon him. The Book of Mormon was Translated by Joseph Smith and is the Word of God. It is a companion to the Holy Bible and when studied together will help us to understand God and his laws and will for us better they any other books on Earth. The D&C and PoGP are also of GREAT worth. Those same keys, rights and Responsibilities have been passed down from Prophet to Prophet, and we are blessed with a living Prophet in our day. President Thomas S. Monson is a living Prophet in our day. He is called of God the same as Moses, Noah, Elijah, and all the others. These are just a few, but certainly the top of the list. A short summery can me found in the Articles of Faith. I leave you with my witness and testimony that these things are true. I have spent much of my life studying and learning these things for my self. I have felt the comforting and confirming witness of the Holly Spirit on a number of occasions confirming these truths. I am grateful to God that we can truly know for our selves if we are willing to pay the price of studying and applying his gospel truths in our lives. May God bless us all in these Latter days with the strength and courage to adhere to and share his gospel truths. In the name of Jesus Christ, Amen