A fascinating read. Here is my opinion on it.
In 1897, the same year as the first Zionist congress, Israel Belkind (“the first practical Zionist”) drew a map: “ ‘The Jordan splits the Land of Israel in two different sections,’ asserted Belkind, whose assessment was subsequently adopted by most [Zionist] settlers of the period” (216).
For the future first prime minister of Israel David Ben Gurion, these borders “were too expansive and untenable, while the borders of the Talmudic commandment were too narrow.” In 1918 he gave his own take: “In the north — the Litani River, between Tyre and Sidon [in Lebanon] … In the east — the Syrian Desert. The eastern border of the Land of Israel should not be precisely demarcated … the Land’s eastern borders will be diverted eastwards, and the area of the Land of Israel will expand” (217).
Not for nothing were the borders of the new state unmentioned in its declaration of independence (233).
UPDATE: Someone has translated my review into French.