and Palestine – but recognized in Der Judenstaat that colonization in either would be difficult: "In both countries important experiments in colonization have been made, though on the mistaken principle of a gradual infiltration of Jews. An infiltration is bound to end badly. It continues till the inevitable moment when the native population feels itself threatened, and forces the government to stop a further influx of Jews. Immigration is consequently futile unless we have the sovereign right to continue such immigration." For that reason, Herzl, both in Der Judenstaat and in his political activity on behalf of Zionism, concentrated his efforts on securing official legal sanction from, as he put it, "the present masters of the land, putting itself under the protectorate of the European Powers, if they prove friendly to the plan." Attempts to negotiate with the Ottoman authorities failed, but with the collapse of the Ottoman empire at the end of World War I and the subsequent creation of Mandatory Palestine under the control of Britain, the Zionists gained success: Britain issued the Balfour Declaration that supported the creation of a Jewish State in Palestine. As pointed out by Michael Stein, Herzl accurately predicted what would actually happen next: the influx of Jews into Mandatory Palestine in the 1930s did make the native Arab population feel threatened, leading to the 1936–1939 Arab revolt – which forced the British Government to announce in the White Paper of 1939 a stop to the further influx of Jews. The instrument envisioned by Herzl was "The Jewish Company" – "partly modeled on the lines of a great land-acquisition company. It might be called a Jewish Chartered Company" – i.e., following in the footsteps of the numerous Chartered Companies which had a major role in the outward expansion of various European powers since the 16th century. The Jewish Company envisioned by Herzl would have charge of both of the properties of all Jews in their present countries and of the lands and properties in the coming Jewish State; it would dispose of the former and provide every Jew with equivalent properties in the new land. Herzl clearly stipulated that "the Jewish Company will be founded as a joint stock company subject to English jurisdiction, framed according to English laws, and under the protection of England" – the City of London being at the time recognized as the financial capital of the world. For