Whatever word you use to describe Israel’s 1967 acquisition of Judea and Samaria — commonly referred to as the West Bank in these pages — will not change the historical facts. Arabs called for Israel’s annihilation in 1967, and Israel legitimately seized the disputed territories of Judea and Samaria in self-defense. Israel’s moral claim to these territories, and the right of Israelis to call them home today, is therefore unassailable. Giving up this land in the name of a hallowed two-state solution would mean rewarding those who’ve historically sought to destroy Israel, a manifestly immoral outcome.

Of course, just because a policy is morally justified doesn’t mean it’s wise. However, our four-decade-long settlement endeavor is both. The insertion of an independent Palestinian state between Israel and Jordan would be a recipe for disaster.

The influx of hundreds of thousands of Palestinian refugees from Syria, Lebanon, Jordan and elsewhere would convert the new state into a hotbed of extremism. And any peace agreement would collapse the moment Hamas inevitably took power by ballot or by gun. Israel would then be forced to recapture the area, only to find a much larger Arab population living there.

Moreover, the Palestinians have repeatedly refused to implement a negotiated two-state solution. The American government and its European allies should abandon this failed formula once and for all and accept that the Jewish residents of Judea and Samaria are not going anywhere.

On the contrary, we aim to expand the existing Jewish settlements in Judea and Samaria, and create new ones. This is not — as it is often portrayed — a theological adventure but is rather a combination of inalienable rights and realpolitik.

Even now, and despite the severe constraints imposed by international pressure, more than 350,000 Israelis live in Judea and Samaria. With an annual growth rate of 5 percent, we can expect to reach 400,000 by 2014 — and that excludes the almost 200,000 Israelis living in Jerusalem’s newer neighborhoods. Taking Jerusalem into account, about 1 in every 10 Israeli Jews resides beyond the 1967 border. Approximately 160,000 Jews live in communities outside the settlement blocs that proponents of the two-state solution believe could be easily incorporated into Israel. But uprooting them would be exponentially more difficult than the evacuation of the Gaza Strip’s 8,000 settlers in 2005.

The attempts by members of the Israeli left to induce Israelis to abandon their homes in Judea and Samaria by offering them monetary compensation are pathetic. This checkbook policy has failed in the past, as it will in the future. In the areas targeted for evacuation most of us are ideologically motivated and do not live here for economic reasons. Property prices in the area are steep and settlers who want to relocate could sell their property on the free market. But they do not.

Our presence in all of Judea and Samaria — not just in the so-called settlement blocs — is an irreversible fact. Trying to stop settlement expansion is futile, and neglecting this fact in diplomatic talks will not change the reality on the ground; it only makes the negotiations more likely to fail.

Given the irreversibility of the huge Israeli civilian presence in Judea and Samaria and continuing Palestinian rejectionism, Western governments must reassess their approach to resolving the Israeli-Palestinian conflict. They should acknowledge that no final-status solution is imminent. And consequently, instead of lamenting that the status quo is not sustainable, the international community should work together with the parties to improve it where possible and make it more viable.

Today, security — the ultimate precondition for everything — prevails. Neither Jews nor Palestinians are threatened by en masse eviction; the economies are thriving; a new Palestinian city, Rawabi, is being built north of Ramallah; Jewish communities are growing; checkpoints are being removed; and tourists of all nationalities are again visiting Bethlehem and Shiloh.

While the status quo is not anyone’s ideal, it is immeasurably better than any other feasible alternative. And there is room for improvement. Checkpoints are a necessity only if terror exists; otherwise, there should be full freedom of movement. And the fact that the great-grandchildren of the original Palestinian refugees still live in squalid camps after 64 years is a disgrace that should be corrected by improving their living conditions.

Yossi Beilin, a left-wing former Israeli minister, wrote a telling article a few months ago. A veteran American diplomat touring the area had told Mr. Beilin he’d left frightened because he found everyone — Israel, the Palestinian Authority, Jordan and Saudi Arabia — content with the current situation. Mr. Beilin finds this widespread satisfaction disturbing, too.

I think it is wonderful news. If the international community relinquished its vain attempts to attain the unattainable two-state solution, and replaced them with intense efforts to improve and maintain the current reality on the ground, it would be even better. The settlements of Judea and Samaria are not the problem — they are part of the solution.