 Item number SCP-752 Object Class Keter Special Containment Procedures Areas 752-1 through Dash 4 have been constructed around the four known entrances to SCP-752. No personnel are permitted to enter SCP-752, although unmanned infiltration missions using technology taken from inside SCP-752 are permitted. In the event of an uncontrollable containment breach, protocol Shandu-47 must be implemented. Otherwise, termination is not advised, as it could lead to the release of SCP-752-1 in the event of failure. Captured instances of SCP-752-1 must be transported to Site-17 for questioning and examination, and under no circumstance allowed to return to SCP-752. As the SCP-752-1 found approaching any of the 752 sites are to be terminated on-site. Description SCP-752 is an underground city in the Northern ██ Mountains, spanning ██ km², population approximately 10,000. An array of electric lighting devices powered by a geothermal generator create day and night matching the rhythm of the outside world. A shield built of an unknown metal surrounds the entire city and blocks all known signals and radiation, including sonar. Study of this metal is restricted to on-site efforts to minimize the chances of containment breach. SCP-752-1 are the inhabitants of SCP-752. Physically SCP-752-1 appear human. However, the social behavior exhibited by SCP-752-1 in large groups bears no resemblance to that of humans or any other social mammal, although parallels exist in ants and other social insects. Individuals of SCP-752-1 possess no self-interest whatsoever, and are motivated solely by desire to advance to greater good of SCP-752. SCP-752-1 currently possesses technology significantly more advanced than exists outside of SCP-752. However, the rate of progress has begun to stagnate. Documents recovered at the site indicate that SCP-752 was constructed ██ years ago by a group of unidentified scientists and philosophers operating under the alias Udemon. SCP-752-1 was engineered by Udemon as an attempt to create an ideal society. SCP-752-3 recovered from Site-752-1, Day-1, Udemon-Alpha-1, population of Eudomonia-100. What a glorious new day! This is the day Homo Eudomonia will set their calendar by. After the last battery and mass testing, we've introduced 50 males and 50 females to the final testing area. Nothing but them, the artificial sun, the temple, and the few animal and plant species we've introduced for domestication. Nothing left for Eudomon now but to observe. Document 752-7 recovered from Site-752-3. Year 8, Day-24, Eudomon-1, population of Eudomonia-124. Population growth has been above normal, as expected from our Eudomoniacs. Instead of competing, they cooperate with one another in everything. All of the animal species provided have been successfully domesticated for food and labor. No signs of agricultural activity yet. Technological progress is proceeding as expected based on the data we left for them in the temple. Document 752-22 recovered from Site-752-4. Year 15, Day-212, Eudomon-4, population of Eudomonia-170. Growth has continued, showing marked deviants from normal human social behavior. Whereas Homo sapiens were never intended to live in groups of more than a few hundred, aged Eudomonia will function perfectly in groups of thousands or millions. Agriculture going at full tilt now, making use of the available aquifers for irrigation. Deviant behaviors have begun to emerge, but taboo against cannibalism seems to have banished and dead Eudomoniacs are being consumed for sustenance. Additionally, disabled or feeble individuals are suiciding or being killed at a worrying rate. Beta-1 wants to interfere, try to lay down moral guidelines, but Alpha-1 insists that finding these things repulsive is one of the problems with our society and any interaction could taint the Eudomoniacs. Global development is proceeding significantly faster than estimated rates. Construction has begun on several structures of unknown purpose, and interesting development considering that no actual buildings previously existed in Eudomonia. Document 752-70, recovered from Site-752-2. Year 24, Day-4, Eudomon-4, population of Eudomonia-300. Construction growth has suddenly exploded, nearly doubling in less than a decade. Presumably this increase is related to the structures. Some other extremely worrying behaviors have begun to emerge. The Eudomoniacs have developed a meritocracy caste system, and are forcing the strongest and least intelligent to build for them. No, not forcing. The workers do it voluntarily, but they're working themselves to death. In fact, everybody in this society is being worked to death. Estimated life expectancy is about 45, and we've proved in the initial testing that Eudomoniacs can live to 150 easily. Those signs of cultural development so far, except that they've built the vague hint of a divine creator called the Eudomon into a brutally strict moral system. On the bright side, they've taken the heart to idea that one day the Eudomon will come back for them and lead them to another world as we'd intended. We've been calling these odd behaviors deviant, but they're not. This society has no deviance. All innovation is judged based on its merits and implemented or discarded. I'm starting to have serious doubts about the value of this whole thing. Alpha-1 and his team of geneticists seem oddly unsurprised by these developments. I bet they knew this would happen. Site-752-142 Recovered from Site-752-1 Year-40, Day-325 Eudomon Alpha-1 Population of Eudomonia Approximately 1000 Population continues to climb. Technological prowess continues to increase exponentially. At this rate, they will reach our level well before the release date. Beta, Gamma, and Delta have no vision. They grow increasingly disgusted by my wonderful creations. I would never have taken them on a project, but I needed their expertise to construct a development chamber. I have taken measures to ensure they never discover the contents of Eudomonia's nurseries. Hopefully, this will be sufficient to forestall a mutiny. Document 752-314 Year-70, Day-87 Eudomon Delta-1 Population of Eudomonia Approximately 3000 Population growth shows no sign of slowing. High-rise type shelters are now being constructed in addition to the unknown buildings to allow for further growth. We can only hope that it will stagnate once they get through what we left in the temple. Undesirable behaviors have worsened. Gamma attempted to intervene and was slaughtered. The rest of us attempted to coup against Alpha. Alpha-3 pretended to sympathize and managed to fatally poison most of Beta. Nevertheless, the coup was a success. We still don't know what's in those buildings, but considering what happened to Gamma, we're not touching it. Alpha-1, 2, and 5 escaped. The others are dead or captured. We've disabled the release mechanism and sealed off the place as much as we dare. The Eudomoniacs still believe that there's no world beyond that shield Gamma built. Now hopefully, they'll never learn otherwise. Unmanned Exploration Unit 752-A was sent into SCP-752 on ████, 2000, and ████ Footage recovered from within the nursery structures indicates an extensive and apparently voluntary ████ before conception. New EU-752-A went offline ████ hours into the expedition, and within two months, technology evidently derived from it was seeing extensive use in SCP-752. Further expeditions must use as little advanced technology as possible. As direct competition between Homo sapiens and SCP-752-1 is projected to lead to an SK-class dominant shift, SCP-752-1 must be kept ignorant of the world outside their cavern at all costs.