Hugo Chavez, the polarizing president of Venezuela who cast himself as a "21st century socialist" and foe of the United States, died Tuesday, said Vice President Nicolas Maduro.

Chavez, who had battled cancer, was 58.

Chavez's democratic ascent to the presidency in 1999 ushered in a new era in Venezuelan politics and its international relations.

Once a foiled coup-plotter, the swashbuckling former paratrooper was known for lengthy speeches on everything from the evils of capitalism to the proper way to conserve water while showering. He was the first of a wave of leftist presidents to come to power in Latin America in the last dozen years.

As the most vocal U.S. adversary in the region, he influenced other leaders to take a similar stance.

But the last months of Chavez's life were marked by an uncharacteristic silence as his health worsened. Chavez underwent a fourth surgery on December 11 in Cuba, and was not publicly seen again. A handful of pictures released in February were the last images the public had of their president.

Chavez's ministers stubbornly maintained a hopeful message throughout the final weeks, even while admitting that the recently re-elected president was weakened while battling a respiratory infection.

President concentrated country's power

Chavez launched an ambitious plan to remake Venezuela, a major oil producer, into a socialist state in the so-called Bolivarian Revolution, which took its name from Chavez's idol, Simon Bolivar, who won independence for many South American countries in the early 1800s.

"After many readings, debates, discussions, travels around the world, etcetera, I am convinced -- and I believe this conviction will be for the rest of my life -- that the path to a new, better and possible world is not capitalism. The path is socialism," he said on his weekly television program in 2005.

Chavez redirected much of the country's vast oil wealth, which increased dramatically during his tenure, to massive social programs for the country's poor. He expanded the portfolio of the state-owned oil monopoly to include funding for social "missions" worth millions of dollars. That helped pay for programs that seek to eradicate illiteracy, provide affordable food staples and grant access to higher education, among other things.

But Chavez also leaves a legacy of repression against politicians and private media who opposed him.

He concentrated power in the executive branch, turning formerly independent institutions -- such as the judiciary, the electoral authorities and the military -- into partisan loyalists.

Through decrees and a judiciary tilted in the president's favor, many political opponents found themselves barred from running in elections against the ruling party. Even former allies, like Chavez's onetime defense minister, Gen. Raul Baduel, faced accusations that critics called trumped-up corruption charges.

Chavez's government similarly targeted opposition broadcasters, passing laws and decrees that forced at least one major broadcaster and dozens of smaller radio and television stations off the air.

Opponents also have criticized his social programs, calling them unsustainable over the long run and responsible for unintended consequences. Price controls, for instance, drove up inflation, while expropriations of farmland depressed production.

Vocal critic of American policy

In lengthy, freewheeling speeches, Chavez saved his most acerbic barbs for the "imperialist" United States and its "colonial" allies in the region.

He accused the United States of trying to orchestrate his overthrow, and referred to President George W. Bush as the devil in front of the United Nations General Assembly.

At home, business interests accused him of scaring off investment by abusing the power of expropriation. Venezuela struggled to grow its economy during this period, even as the nation was flush with money from oil, which was at about $17 a barrel when Chavez took office and rose to more than $100 a barrel.

In addition to domestic social programs, the Chavez government pumped money into his foreign policy interests. He invested millions of dollars in oil and cash in countries that were ideologically similar.

Chavez considered former Cuban leader Fidel Castro a mentor, and aligned his country with Iran and other nations opposed to the United States.

Cuba loses a benefactor in Chavez, whose provision of an oil lifeline at below-market prices could be at risk under a new government.

While Chavez admired Castro, he found most inspiration from Bolivar, even renaming the country the Bolivarian Republic of Venezuela.

An affable, if sometimes bombastic, man, Chavez had a disarming manner that even his critics could not deny.

Some called his style buffoonish, but he spoke like an ordinary Venezuelan -- not like a bureaucrat -- and voters reacted positively.

Other leftist leaders elected after him, like Bolivia's Evo Morales, Ecuador's Rafael Correa and Nicaragua's Daniel Ortega, followed Chavez's example to varying extents.

Chavez could also be secretive. He was slow to publicly admit that he had cancer, and never shared what type of cancer affected him. The government kept a tight seal on details of the president's treatment and declining health.

The death of the Venezuelan president leaves a sharply polarized country, with no clear successor for his party and an untested opposition. Chavez' passing means new elections will be held, although he had said previously he wanted Maduro to succeed him.

Chavez was born in the plains state of Barinas, in southwest Venezuela, on July 28, 1954, the third of the seven children of two educators.

As a child, he was an altar boy who went on to develop a great love of baseball. Recently, even as questions arose about his health, the media-savvy Chavez sought to reassure the public by playing catch with his foreign minister on state television.

Chavez became more authoritarian over the years

As a young man, he enrolled in the Military Academy of Venezuela, reaching the rank of sub-lieutenant in 1975. He joined the parachute corps of the army and rose through the ranks to become a lieutenant colonel.

His first political steps came when he founded the Revolutionary Bolivarian Movement, or MBR-200, in 1982. A decade later, on February 4, 1992, he led a failed military rebellion against then-President Carlos Andres Perez. He also made his first public appearance in front of the television cameras.

"Compatriots, sadly for now the objectives that we proposed were not achieved in the capital city," he said. "That is to say, we here in Caracas did not succeed in gaining power. You did it very well out there, but now is time to avoid more bloodshed. Now is time to reflect and new situations will come."

Chavez served two years in prison before then-President Rafael Caldera granted him amnesty.

Chavez went on to form a new political party, the Fifth Republic Movement, which carried him to a presidential election victory in 1998. His fiery campaign speeches blamed the traditional parties for corruption and poverty.

Chavez married twice and divorced twice. He had three children with his first wife, Nancy Colmenarez: Rosa Virginia, Maria Gabriela and Hugo Rafael.

Years later, he married Marisabel Rodriguez, with whom he had a fourth daughter, Rosa Ines. He divorced in 2003; Venezuela has had no first lady since then.

Upon taking office, Chavez made rewriting the constitution one of his first orders of business. A July 2000 referendum affirmed the new constitution, which the government printed as a little blue book that Chavez used regularly as a prop during speeches.