The correct answer is - Israel.
Even though officially formed in 1948, the state of Israel started to take shape in 1947, when the United Nations, after the request of the United Kingdom, got involved into the mess that was taking place between the Jewish people and the Arab people on the territory on what is nowadays the country of Israel. The Jewish migration started few decades prior to this, and their population was steadily increasing, and that brought a big revolt from the Arab population, both on the territory of migration, and in all of the Arab countries in the surrounding area.
However, after the sufferings in the World War II of the Jews, the United Nations decided that they deserve their own country, thus encouraged the formation of the country of Israel. That resulted into mass migration of Jewish people after 1947, and very soon they became the majority of the population on this territory. Because of the displeasure of the Arab countries, there were few wars afterwards, in all of which, Israel came to be the winner.
