This essay seeks to examine the history of the intellectual comradeship between J.L. Talmon and the philosopher, political thinker, and historian of ideas, Isaiah Berlin (1909–1997). The scholarly dialog between the two began in 1947, continued until Talmon's death in 1980, and is well documented in their private correspondence. I argue that there were two levels to this dialog: First, both Berlin and Talmon took part in the Totalitarianism discourse, which was colored by Popperian terminology, and thus I claim that (...) their ideas should be examined as part of the Cold-War political discourse. The second level stemmed from their similar East-European origin, their mutual Jewish identity, and their attitude towards the Zionist movement. At times the two levels of discourse conjoined commensurably, but in other cases the juxtaposition of the two created conceptual tensions. Examining Berlin and Talmon's thought from this dual perspective, I argue, can shed new light on the inner conflicts and conceptual tensions that each of them had to face. In particular, I claim that both thinkers tried to integrate their Anglophile liberal heritage with their support of National movements in general, and the Jewish National movement in particular. Nevertheless, the different approaches of Talmon and Berlin present two concepts of liberal Nationalism: While Talmon assumed that Zionism solved the Jewish individual's dilemmas by making Jews members of a commune attached to soil; Berlin sought to preserve the individual in an inviolable sphere and thus was more ambivalent in his attitude towards the state of Israel. In conclusion, I offer to see Talmon as a classic Zionist liberal and Berlin as a supporter of what I call “Diaspora Zionism”, an approach, which would later provide the grounds for Berlin's celebrated pluralism. (shrink)