Significant Cultural Impacts in the Terragen Sphere

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| The sentient ship 'Fortunate Cloud' decelerates into orbit around To'ul'h Prime, prior to first contact with the intelligent species there |
Since humanity left Old Earth, some historical events have had a significant impact on culture and custom across all or some of the Terragen sphere. Lists vary according to one's memetic biases, but these include:
First Order (Terragen sphere)
* Backyarders, 5th century AT
* Nanoswarms, 6th century AT
* Great Expulsion 622 AT
* The first Singularity (the attainment of the First Toposophic level) (2nd & following toposophics with diminishing direct impact) more here
* Version War
* Earliest distinct nonhuman or posthuman Terragen cultures (subsequent events are second or third order)
Second Order (Regional)
* Negentropism: First Promulgation of the Precepts, 1965 AT
* Solarism: First Interface, 2014 AT
* NoCoZo: Non-Coercion Agreement 1450 AT
* Sophic League: foundation 2345 AT; also important was the Reformulation of 2752 AT
* Metasoft: founded 22nd century AT, vec takeover 2344 AT, creation of the Version Tree 2582 AT
* Keterism: founded at Ain Soph Aur 1788 AT
* Verifex event: 7434 AT
* Oracle War 10480
* Carina Rush
* Contact with the Muuh, an ancient race with venerable technology
* Contact with the Meistersingers, a race seemingly in contact with several other galactic cultures
* First provolves, and AIs, before they developed their own cultures
* Contact with the To'ul'h (subsequent contacts with lower tech xenosophonts are 3rd order)
* First Interstellar colonies (particularly Nova and Penglai, and others which went on to found colonies of their own)
Third Order (niche effects or very local effects)
* Provolution/design of any major clade or a minor exotic clade
* Invention of the Worldhouse
* First Bishop Rings
* Defeat of the Conver Ambi
* Contact with any lower tech xenosophonts (i.e. Paulans)