2015: All around the world, people start disappearing - all between the ages of 30 and 50. None ever leave a trace of where they went or what happened.
2016: There are very few people left between 30 and 50 years of age, with only those who live in houses protected in some unknown form being the only ones left. Those older than 50 are forced to act as educators for the young people of Earth. Some riots are reported around the world, with people saying that governments are not protecting their people properly.
2017: Disappearances stop. People start exhibiting abilities beyond normal human capabilities, such as superhuman strength, flight, telepathy, etc, and people start to change their names and those of others to match their powers or personalities. Very few have any use for their old names. Governments are overthrown all over the world, and groups led by self-proclaimed Citylords take over cities and inhabited regions of the world. Monsters start roaming the streets, finding abandoned buildings and using them as lairs. Streets become less populated, as people rarely come out unless they need to. By the end of the year, criminal groups and corrupt Citylords are hiring mercenaries to hurt or kill those who don't pay for protection. Currency becomes useless, being replaced by a trade system. Citylords start trading between each other, forming alliances, and creating central markets in their cities, while black markets start to appear in some of the outer parts of many cities.
Early 2018: Society starts to stabilise, as people become accustomed to the new system. However, attacks continue to happen on people, and staying outside for too long is still dangerous. While people are now more friendly, most are still cautious, and try to stay away from those they do not know. Many still use their powers for combat and mercenary jobs. They are usually found in the black markets. It is discovered that blood relatives can share their powers in close proximity.