The Great Cataclysm is the story of the Ancestors of the first Pêr-Ahâ (which became Pharaoh in Greek phonetics) hieroglyphs meaning 'Descendants of the Elder'.

Ahâ could be translated into French phonetically as 'Adam', and in fact, the Chronological Annals engraved on the walls of the first temples of Upper Egypt, or painted on the leather scrolls in the various archive rooms of the 'Houses-of-Life', recount the life of a people starting from this 'Elder': the Ahâ.

Their continent was called Ahâ-Men-Ptah (which, thanks to Plato, became Atlantis), which translates as 'God-you-slept-on-his-Eldest'.

It is the entire history of monotheism on this continent of Ahâ-Men-Ptah that is detailed in Le Grand Cataclysme, because over several millennia, the people 'Descendant-of-the-Eldest' lost sight of their origin and took themselves for God. This culminated in the sinking of the Edenic continent following a terrible geological upheaval 12,000 years ago, about which there is no shortage of stories. The survivors took it upon themselves to instil fear.