The Terrible Events were a period of world-wide devastation that occurred in the year -5 A.R.. The specific nature of The Terrible Events is not well known as most of the historical record from this period was destroyed. What is known is that high-technology was a major factor, although it is not clear if this was because of an accident at a research facility, a global war, or something else.
It is known that in the centuries following the Terrible events the climate warmed sufficiently for major population centers to move away from equatorial regions. In the novel Erasmas states that "more recently"  a decrease in carbon dioxide levels reversed this trend because of a reduction in carbon dioxide in the atmosphere and also to "get away from the solar radiation at the poles." These statement imply both that global warming and the depletion of ozone near the poles became serious issues following the time of the Terrible Events.
The destruction that led to the Terrible Events did not arise suddenly. Serious global upheavals occured in the decades prior to the collapse of the Praxic Age. The Terrible Events were preceded by three major global upheavals known as the three Harbingers. Because of the destruction of records in the Terrible Events specific details are missing.
- The First Harbinger (A.R. -74) is believed to have been a worldwide outbreak of violent revolutions.
- The Second Harbinger (A.R. -52) is believed to have been a world war.
- The Third Harbinger (A.R. -12) is believed to have led to a massive genocide.
Consequences of the Terrible EventsEdit
The Terrible Events were the catalysis for the Reconstitution in 0 A.R. which lead to the creation of maths and the segregation of science and technology experts from the rest of society. In the time of Erasmas (c. A.R. 3700) it is unclear if this segregation was forced upon the scientific community by the remaining Saecular Power, whether it was voluntary or somewhere between these extremes.
The unrestricted development of high technology was seen as a major reason for the level of destruction in the Terrible Events, in particular with the development of extremely small but powerful weapons of mass destruction like the Everything Killers.
It seems likely that the increase in global warming and decrease in ozone levels following the Terrible Events were due to the general high level of industrialization and lack of long-term foresight at the end of the Praxic Age. These tendencies are, of course, also present in current real-life civilization.
It is hinted that the Terrible Events were caused by (or occurred shortly after the activation of) very large matter colliders, similar to, but larger than, the Large Hadron Collider.