Zionism was (and is) the movement to establish and preserve a Jewish homeland, so it was the movement to create Israel.
It is the ideology that Jewish people should have their own state. The Land of Israel was promised to the Jewish people by God, according to The Bible. Jews lived in the Land of Israel from the time of Joshua until the Roman destruction of the Second Temple in 70 CE. Almost all Jews were exiled to other countries, known to Jews as the Diaspora. For centuries, Jews prayed for a return to Zion. In the nineteenth century, the Zionist movement, led by Theodor Herzl and Chaim Weizmann, encouraged Jews to turn the dream into reality, and lobbied the international community to understand that a "Jewish national home" was the only solution to anti-Semitism and the "Jewish problem."
In 1947, the dream was realized when the UN voted to partition Palestine between the Jews and the Arabs. The Arabs immediately attacked the Jews and in the middle of the war, on May 14, 1948, the State of Israel declared its independence. Today, about half of the world's Jewry lives in Israel. Most Jews living in and out of Israel are supporters of Israel and the Zionist ideology, although a small percent believe only divine intervention should bring about a Jewish state.
The question as posed is nonsensical. Zionism is the movement responsible for the entire creation of Israel. The changes "due to Zionism" are completely inseparable from the changes that occurred naturally as Israel developed as a State.
Zionism is the belief that the Jews should have political self-sovereignty and is the patriotic sentiment behind the Establishment of the State of Israel. The existence and preservation of the State of Israel is probably the clearest example of Zionism.
Zionism, specifically Israeli-State Zionism (but as there are no current movements to create a Jewish State in Argentina, Uganda, or Madagascar, the term Zionism is now exclusively used for Israel).
Zionism.
The result was that the State of Israel was formed.
This is called Zionism.
Zionism is the call for Jews to freely live in their ancient homeland.
Zionism is certainly one of the causes of the Israeli-Palestinian Conflict. It is not the only cause of the conflict and is also not the most important cause of the conflict. Zionism is responsible for the existence of the State of Israel since Zionism was the Jewish Nationalist movement to establish a Jewish State in the Land of Israel. Without Israel, there would be no Arab-Israeli conflict. However, it is worth noting that while Zionism is a base cause of the Arab-Israeli conflict, numerous other far more lethal conflicts (like the Iran-Iraq War) have nothing to do with Israel.
It's called Zionism. Look it up!
In a very distant way, Zionism is responsible for the existence of Israel. Without Israel, there would be a unitary Arab State in Palestine and therefore no blockade problem in Gaza. However, Zionism has no direct connection to the blockade of the Gaza Strip.
Zionism is the belief that the Jews should have political self-sovereignty and is the patriotic sentiment behind the Establishment of the State of Israel.
Anti-Zionism is a movement which denies the right of Israel to exist, and the right of the Jewish people to the Land of Israel. However, Israel has been the Jewish homeland since biblical times. Although much of Anti-Zionism is devoted particularly to the State of Israel, Anti-Zionists reject the idea of any Jewish State anywhere in the world as an unnatural, undesirable, and wrong situation.