Challenge and response
Max Dimont wrote The Indestructible Jews (1971) partly as a reply to Arnold Toynbee, who had called the Jews a “fossil” of a dead civilization. Dimont used Toynbee's own method against him. In his account Rome, Persia, Islam and feudal Europe each posed a challenge, and Jews survived each one with an intellectual response: the Mishna, then the Gemara, the Gaons' responsa, the codes of the Poskim. The ribbon at the top of the page marks his six stages. The two hatched bands, between the second and third challenges and between the fourth and fifth, are what he called interregna: periods when one order had collapsed and the next had not yet formed.
His sixth stage, the “sick society” of the scientific age, ends with the “fall of the Talmud”. He did not mean that study stopped. He meant that the Talmud no longer held Jewish life together on its own: emancipation, secular learning and Zionism now offered Jews other answers. Some of his phrasing is his own, too. The medieval chart's dry refrain of “more salvation” is Dimont's irony, and it is kept as he wrote it.