The Forbes 400 will be making history on Tuesday when the company’s top 500 list of wealthiest people in the world is released.

The list, which was unveiled in November, will rank the richest people in history on the basis of their net worth, net worth adjusted for inflation, total assets and cash, as well as their share of total global wealth, including assets held by their heirs and estates.

While it’s unlikely that the Forbes 400’s most powerful families will be among those on the list, the list will also provide a measure of how wealthy Americans are relative to the rest of the world.

It will provide insight into how much wealth an individual can realistically expect to have in retirement.

Forbes CEO Larry Ellison, who chairs the company, said in a statement the announcement of the list “is a testament to the power of an individual’s own life to create wealth, and the importance of being financially flexible, especially in times of uncertainty and stress.”

“The list provides a glimpse into how wealth is created and distributed,” he added.

The billionaires who will make the list include Warren Buffett, Warren Buffet, Peter Thiel, Bill Gates, Mark Zuckerberg, Carlos Slim and Mark Zuckerberg Jr., as well-known for investing in tech companies.

Ellison said the list was assembled by analyzing financial records, interviews with the richest Americans, aswell as an analysis of financial trends in the United States.

The top 500 will include more than 3,000 people from more than 140 countries.

They include:George Soros, the billionaire investor, philanthropist and philanthropist who is worth $16.5 billion;Warren Buffett, the Berkshire Hathaway founder and CEO worth $25 billion;Bill Gates, the Microsoft founder and chairman of Microsoft worth $48.9 billion;Mark Zuckerberg, the Facebook founder worth $50.2 billion;Carlos Slim, the world’s fourth richest man with a fortune of $27.4 billion; andMark Zuckerberg Jr. the youngest of the billionaire siblings, the youngest person to hold the title.

The full list of the 400 wealthiest Americans in the 20th century will be published on Tuesday.

Ellisons announcement comes at a time when the wealthiest Americans are feeling the squeeze from the economic downturn, with some reporting their incomes falling and others struggling to pay the bills.

The United States ranks at the bottom of global income distribution with an average of $18,900 per person, according to the World Bank.

The wealthiest people around the world are also under increasing pressure as the world grapples with a debt crisis, with countries around the globe borrowing more and spending more on the military and infrastructure needed to fight the war on terrorism.