Four things that led to the establishment of the modern state israel?

1) 1917- Britain seizes Palestine from Ottomans. Gives support to "national home for the Jewish people" in Palestine through the Balfour Declaration, along with an insistence that "nothing shall be done which may prejudice the civil and religious rights of existing non-Jewish communities".

2) Zionism - movement to unite displaced Jews and settle them in Palestine.

3) Theodor Herzl;. Herzl came to the conclusion that, no matter how much the Jews assimilated into their host countries, they would always be persecuted. The only solution, Herzl believed, would be the exodus of Jews from these countries to a specifically Jewish country. Although he died in 1904, decades before the formation of the State of Israel, the state owes its existence in large part to Herzl’s ideas.

4) The Holocaust;  The Holocaust was such a powerful demonstration of Herzl’s reasons for setting up a Jewish country being taken to their logical extreme that that Jewish country, the State of Israel, was declared just three years following the end of World War II, on May 14, 1948.