Israel is the world’s only Jewish state, located just east of the Mediterranean Sea. Palestinians, the Arab population that hails from the land Israel now controls, refer to the territory as Palestine, and want to establish a state by that name on all or part of the same land. The Israeli-Palestinian conflict is over who gets what land and how it’s controlled.

Though both Jews and Arab Muslims date their claims to the land back a couple thousand years, the current political conflict began in the early 20th century. Jews fleeing persecution in Europe wanted to establish a national homeland in what was then an Arab- and Muslim-majority territory in the Ottoman and later British Empire. The Arabs resisted, seeing the land as rightfully theirs. An early United Nations plan to give each group part of the land failed, and Israel and the surrounding Arab nations fought several wars over the territory. Today’s lines largely reflect the outcomes of two of these wars, one waged in 1948 and another in 1967.

The 1967 war is particularly important for today’s conflict, as it left Israel in control of the West Bank and Gaza Strip, two territories home to large Palestinian populations:

Today, the West Bank is nominally controlled by the Palestinian Authority and is under Israeli occupation. This comes in the form of Israeli troops, who enforce Israeli security restrictions on Palestinian movement and activities, and Israeli “settlers,” Jews who build ever-expanding communities in the West Bank that effectively deny the land to Palestinians. Gaza is controlled by Hamas, an Islamist fundamentalist party, and is under Israeli blockade but not ground troop occupation.

The primary approach to solving the conflict today is a so-called “two-state solution” that would establish Palestine as an independent state in Gaza and most of the West Bank, leaving the rest of the land to Israel. Though the two-state plan is clear in theory, the two sides are still deeply divided over how to make it work in practice.

The alternative to a two-state solution is a “one-state solution,” wherein all of the land becomes either one big Israel or one big Palestine. Most observers think this would cause more problems than it would solve, but this outcome is becoming more likely over time for political and demographic reasons.