Adam, along with his consort, Eve, are the Material Sons of Jerusem in charge of acting as the initiators of the adamic race on Urantia, following a plan that is thus carried out on all inhabited planets.
Adam and Eve had been experimental energy directors for living forms for 15,000 years, and had previously worked as instructors in citizenship schools.  Both were expert anatomists.  Left behind 100 sons and daughters born on Jerusem. 
Adam and Eve were members of the senior body of Material Sons, registered as 14,311.  Both had kept their oath of allegiance to the Most Highs and to Michael.  Adam and Eve were thoroughly instructed on the dangers of Urantia. Both had been loyal during the Lucifer rebellion but upon receiving their mission they were asked to remain loyal.  Should be subject to the directives of the Melchizedek receivers.  The guardian archangel warned them on Urantia not to combine good and evil.  If they deviated from the divine plan the sure result would be degradation to mortal status. 
Their arrival was authorized by the Most Highs, and especially by Tabamantia, the sovereign overseer of the experimental worlds.  Both were rematerialized on Urantia 37,848 years ago; the process lasted 10 days.  Asked the Melchizedek receivers to stay with them; they refused and left Adam and Eve with responsibility for the planet.  Both had learned and spoke the Andonic dialect of Urantia.  Together with Eve they both established a government and an administration.  Adam advised not to initiate a racial uplift until his family amounted to 500,000 descendants; he also gave other instructions.  Adam taught agriculture.  He rejected the worship of the Garden dwellers. 
Adam and Eve had 105 pure-line children.  After default, all those under 20 years of age withdrew to Edentia, along with two-thirds of those over 20 who also decided to leave.  Adam and Eve established a whole new system of education.  On Edentia the sons of Adam were deprived of their procreative powers.  It is believed that one day they will serve on Urantia alongside the Planetary Sovereign. 
The Urantia Book recounts in detail how the default of Adam and Eve occurred.  Adam broke his orders, but did not get involved in Lucifer's rebellion. Caligastia never got Adam and Eve to join her rebellion.  Adam had premeditated sex with Laotta after Eve had sex with Cano.  He then wandered in solitude for 30 days.  The fault occurred after 117 years from arrival.  Caligastia contributed to the fault.  Caligastia held many conferences with Adam.  Degradation occurred after Adam, Eve, and her children were defaulted to mortal status.  The Urantia races were deprived of a physical nature more consonant with spiritual aspirations.  But the default did not prevent biological evolution.  Gabriel appeared before Adam and Eve to pronounce the verdict of their judgment.  The fault left the Garden of Eden unopposed to the Nodites, who invaded it.  Adam and Eve were not allowed to take the tree of life with them after the failure, and they remained in the first Garden.  They both received a personal message from Michael after the foul, somewhat enigmatic, which provided comfort.  Both received Adjusters after the fault, something that encouraged them greatly despite their degradation to mortal status.  The Melchizedeks refused to advise Adam and Eve after the fault, and were urged to do what they considered most correct.  The consequences of the Lucifer rebellion and the neglect of Adam and Eve represent a double tragedy for Urantia.  Regardless, Adam and Eve were told that the transgression was an error of judgment, not a sin.  The offense consisted of a departure from the orderly path. 
Adam and Eve encouraged Cain to leave the second Garden.  The lands of the Adamic family in the first Garden covered just over 1,300 hectares. 
Adam and Eve had a family of 1,647 pure-line descendants before the fault, and they had 42 children after the fault. In total Adam and Eve had 63 children of their own.  Both Adam and Eve were too impatient; they were well-meaning but deluded.  The plan was to build a strong reserve of the violet race before beginning racial upstep.  The original plan of the Melchizedeks was to upstep the red race with one million pure-line descendants of Adam, but it could never be.  They could emit and receive their thoughts up to a distance of 50 miles, but lost this ability with failure.  It is speculated that Adam, Eve, or some of their descendants may ever return to Urantia as Vice-Manager Material Sons of Urantia.  Adam and Eve's special senses were not progressively transmitted to their descendants.  Adam and Eve, after their death, survived and passed to Jerusem as ascending citizens.  Adam's sons impregnated 1,682 women, mainly Nodite women, who produced 1,570 superior sons.  Due to the amount of things that overwhelmed Adam, he delegated the subject of worship and education to the Nodites, who reverted to their old ways.  Adam lived 530 years; he died of old age.  Michael is the second Adam on Urantia, achieving success where Adam did not.  The reason for going out and forming a second Garden was to avoid an armed conflict with the Nodites; Adam had no appreciation for war.  Adam was not in the royal ancestry of Joseph, father of Jesus, despite the statements of the Gospels.  Currently Adam is one of Michael's 24 personal counselors on Jerusem. 
He bequeathed much of the humor that current races enjoy, more than what is conveyed in music or art.  Adam's genetic inheritance created immunity to many diseases.  The result of Adam's effort was enormously upstepped Urantia peoples.  Adam's gift improved the brain power of the races.  The Adamic lineage stimulated the tendency for adventure and exploration.  The ancient Hebrews awaited the return of Adam. 
They were about eight feet tall; their bodies shimmered.  They were able to see the midwayers, the angels, the Melchizedeks, and Caligastia.  They ate fruits and nuts once a day; they also absorbed light and energy from space and ate from the tree of life.  They had a double circulatory system of physical and non-physical nature; the second system was nourished by the tree of life.  They never ate meat on a regular diet; never cooked food.  Adam and his children never drank animal milk, only fruit juice. 
The belief was established that his sin caused a curse on mankind. The Jews sought to trace their origin back to Adam himself.  Legends about Adam were confused with events that occurred with the Planetary Prince's staff at his coming. 
Paul elaborated the doctrine of Christ as the second Adam based on a similar doctrine of Peter, although both failed in the scope and understanding of this idea.  The Prince's staff were promised that they would obtain the Adamic gift at some point. 
Adam and Eve were coming to establish a representative government, but such a thing did not exist on Urantia.  They remained isolated, distressed, and disheartened by the sorry plight of the world.  His mission was fraught with danger.  No Adam ever had to deal with a more difficult world.  They had many problems establishing a system of law and order as Caligastia's ideas of unbridled freedom had permeated the backward tribes. 
See also: UB 74; UB 75; UB 165:0.1; UB 74:1; UB 75; UB 75:1.