This is the most recent mapping of the conflict. Its roots go back all the way to the fight of two desert tribes over scarce land and water resources. Or perhaps, given the Jewish Diaspora under Rome, only as far back as the Balfour Declaration of 1917, which established in Palestine a "home" for the Jewish people with a guarantee of "civil and religious rights of existing non-Jewish communities in Palestine." Of course, in the intervening years, Israel has repeatedly taken land and scarce water from the Palestinians, refused the refugees that it has created the right of return (thereby ensuring that their lands and goods, if any, become the property of the state of Israel), and reduced the "land of Palestine" to a series of narrow unconnected strips with no sovereignty and severely restricted movement.