Palestinian society is splintered along deep political, geographic and ideological lines that will be exacerbated by the death of Yasser Arafat, the only leader most Palestinians have ever known, according to Palestinian officials and analysts.

The divisions are hardening between various factions: Arafat's old guard and a new generation of reformists who have been waiting for years to assume power; local leaders in the West Bank and their counterparts in the Gaza Strip; nationalist and Islamic leaders; and the Palestinian diaspora and residents of the territories.

By the force of his legendary status, charisma and accumulated decades of power, the 75-year-old Arafat bridged or imposed authoritarian control over most of those divisions.

"Now for any other leadership the ground rules have changed," said Ziad Abu Amr, an independent, reformist legislator from Gaza City. "No one else can do it the way Arafat did. Any new leader will have to work on power- sharing" between exiles and residents, the old guard and the new generation, Islamic militant groups and secular nationalists, he said.

The Islamic Resistance Movement, known as Hamas, has suggested a coalition leadership that includes all major factions, including Islamic groups. At the same time, other militant groups have warned they will oppose any Palestinian ruler who tries to end the uprising.

The decision of Palestinian leaders this past week to appoint Prime Minister Ahmed Qureia and his predecessor, Mahmoud Abbas, to the positions Arafat has long held has created an appearance of continuity and stability. But it is a short-term solution that could backfire if elections are not conducted relatively quickly, according to officials and analysts.

"Conducting timely and credible elections is crucial," said Mouin Rabbani, a Middle East analyst for the International Crisis Group who was visiting the West Bank city of Ramallah on Friday. "Arafat did not need Palestinian elections to become the legitimate Palestinian leader -- he had other sources of legitimacy because of his unique historical role. Anyone who replaces him is going to need clear popular mandates."

The Palestinian Authority is financially broke, politically divided, rife with corruption and largely unable to provide security for its own people. Even before Arafat's recent illness, top Palestinian officials warned the governing body was in danger of collapse and was unable to contain mounting internal violence and chaos in the Gaza Strip and some West Bank cities. Now, rival factions and interests will intensify the struggle for control of Palestinian institutions.

One contest will pit members of Arafat's old guard, such as Qureia, 66, and Abbas, 69, who have been part of Arafat's political entourage for decades, against new Palestinian political elites who have spent their lives in the territories. Among West Bank Palestinians, the most popular of the new generation is 45-year-old Marwan Barghouti, who has been imprisoned by Israel since being convicted on charges that he orchestrated attacks that killed five people. He has denied the charges. Israeli officials are not likely to release Barghouti from prison, according to Yuval Steinitz, chairman of the Israeli parliament's foreign affairs and defense committee.

In contrast to Qureia and Abbas, Barghouti is a firebrand with a magnetic personality. While Barghouti served as the West Bank leader of Arafat's political organization, the Fatah movement, he sought to keep his distance from the corruption surrounding Arafat. But even the Palestinian political faction that considers itself reformist is fractured by special interests and geography.

Two potential leadership contenders draw their influence from the Palestinian security forces they have led: Mohammed Dahlan, 43, a former security chief in the Gaza Strip who holds no official position but is a power broker in the isolated coastal strip; and Jibril Rajoub, 51, Arafat's national security adviser, who is from the southern West Bank city of Hebron. Security forces in Gaza loyal to Dahlan have been responsible for several attacks in recent months against competing security officials more loyal to Arafat.

But their geographic base could make it difficult for Dahlan or Rajoub to win broad-based elections.

Few leaders have emerged who are considered representative of the entire West Bank. Israeli troops have isolated major urban areas with checkpoints and restrictions on the use of major connecting roads by private Palestinian vehicles. As a result, some local mayors and governors who have become popular within their own communities are unknown elsewhere in the West Bank.

Perhaps the most volatile issue splitting Palestinians is the expanding influence of Islamic militant groups such as Hamas and Islamic Jihad. In addition to fueling support for an armed resistance, Hamas has won support among Palestinians in the Gaza Strip by providing social, health and education services in the most impoverished neighborhoods.

In the West Bank, the political wings of Hamas and Islamic Jihad have been winning elections on college campuses and in local labor organizations in recent years, taking over hundreds of positions from Arafat's secular Fatah movement. But in the past, Hamas has refused to participate in the Palestinian Authority elections established in the 1993 Oslo peace accords.

In meetings with Prime Minister Qureia, Palestinian security forces and militant organizations on Saturday in Gaza City, Hamas officials said any leadership coalition established to succeed Arafat should include representatives of all Palestinian factions. Such a move would almost certainly be opposed by Israel, the United States and other nations unless the Islamic group agrees to give up its violent attacks against Israel.

Arafat's absence could also aggravate the division between the 3.6 million Palestinians who live in the West Bank and Gaza Strip and those who live outside the territories, including the 2.5 million Palestinians classified as refugees by the U.N. Relief and Works Agency in Jordan, Syria and Lebanon.

Arafat, who has spent the past decade in the Palestinian territories but lived elsewhere for the previous 27 years, represented the interests of both groups as president of the governing Palestinian Authority and chairman of the international Palestine Liberation Organization, which represents Palestinian groups here and abroad.

With those two organizations under the control of different men, some Palestinian officials said refugees were concerned they could get shortchanged in any peace settlement, particularly on the issue of the so-called right of return -- the priority of refugees who want to reclaim homes inside Israel that they or their families left years ago.

Israeli officials said they hoped the death of Arafat would open the way for more moderate Palestinians to take over the leadership of the government and its related political organizations, including Fatah and the PLO. But most senior Israeli officials are reluctant to mention names, saying that any Palestinian leader who received Israeli backing would be treated with scorn and distrust on the street.

The current and former Palestinian prime ministers, Qureia, known as Abu Ala, and Abbas, known as Abu Mazen, are well regarded by most Israeli officials because of their strong stand against suicide bombings and other violence, and for their efforts to try to persuade Arafat to accept democratic reforms and relinquish his control over Palestinian security organizations.

"I do hope people like Abu Mazen and Abu Ala will take his place, but I am afraid it is too early to say," said Steinitz, the chairman of the Israeli foreign affairs and defense committee. "But it's not certain even if there is a moderate leadership that they will be able to change the reality on the spot."

"I don't think the problem lies in our divisions," said Abu Amr, the reformist Palestinian legislator, adding that improvements in Palestinian governance will hinge on Israel's efforts to allow a new process to evolve and on the work of future Palestinian leaders. "Everything depends on how the Palestinian leadership leads, whether they touch the hearts and minds of the Palestinian people, whether they solve problems and break the deadlock with the Israelis and repair relations with the world and bring back support to the Palestinians. One man alone cannot do it. Even Arafat himself could not do it."

An old guard and a new generation are vying to replace Yasser Arafat as the Palestinian leader. The key contenders include: top, from left, Jibril Rajoub, 51, Arafat's national security adviser; Marwan Barghouti, 45, a popular West Bank leader now in an Israeli jail; Mohammed Dahlan, 43, a former security chief in the Gaza Strip; and, bottom left, Prime Minister Ahmed Qureia, 66, and his predecessor, Mahmoud Abbas, 69.