A billionaire Facebook founder has agreed to donate $20million to defeat Donald Trump just weeks before the election.

Dustin Moskovitz, 32, announced his latest donation in a post he wrote for Medium earlier this month, stating: 'The events of the past few weeks have only deepened my conviction that Hillary is the best choice for America. I hope that these contributions will help make that outcome a reality.'

Just one month prior, Moskovitz revealed in another Medium post that he has donated $15million to help elect Clinton and other Democrats.

But despite these staggering donations, many in the Democratic party know very little about Moskovitz, who is worth $10.7billion according to Forbes.

Big money: Facebook co-founder Dustin Moskovitz (above) announced earlier this month he was donating $20million to defeat Donald Trump in the election

Big fan: That donation came just one month after he donated $15million to Hillary Clinton (above) and other Democrats

Moskovitz explained his reasons for supporting Clinton and his disdain for Trump in his September Medium post.

'We cannot ignore the remarkable alignment between these two visions for society and the choices in this year’s election. The Republican Party, and Donald Trump in particular, is running on a zero-sum vision, stressing a false contest between their constituency and the rest of the world,' wrote Moskovitz.

'We believe their positions, especially on immigration, which purport to improve the lives of Americans, would in practice hurt citizens and noncitizens alike.

'In contrast, the Democratic Party, and Hillary Clinton in particular, is running on a vision of optimism, pragmatism, inclusiveness and mutual benefit.'

Moskovitz is not the only major Facebook employee to support Clinton during this election.

Chris Hughes and his husband Sean Eldridge held a fundraiser at their $5million Soho apartment for Clinton last year.

Hughes is now worth an estimated $850 million and was the owner and publisher of The New Republic before selling the magazine this past February.

Half of the $20million Moskovitz and his wife, journalist Cari Tuna, are giving will go to the League of Conservation Voters and to a political action committee called For Our Future.

The latter group is a get-out-the-vote effort in battleground states that is paid for primarily by labor unions and hedge fund billionaire Tom Steyer.

Moskovitz and Tuna also are giving directly to Clinton's campaign and to party committees helping Senate and congressional Democrats.

Moskovitz became the youngest self-made billionaire in history when Facebook went public.

He and Tuna, a former Wall Street Journal reporter, also recently joined forces to create the philanthropic organization Good Ventures.

The couple live together near Silicon Valley.

Relationship: Moskovitz, who is worth $10.7billion, is married to journalist Cari Tuna (above)

Cause: 'We need to figure out how to bring everyone with us, and we believe the Democratic platform currently is more aligned,' said Moskovitz (above in 2007)

'As a nation, we need to figure out how to bring everyone with us, and we believe the Democratic platform currently is more aligned with ensuring that happens,' wrote Moskovitz on Medium.

'In comparison, Donald Trump's promises to this group are quite possibly a deliberate con, an attempt to rally energy and support without the ability or intention to deliver. His proposals are so implausible that the nation is forced to worry that his interest in the presidency might not even extend beyond winning a contest and promoting his personal brand.'

Politico reports that before this cycle, Moskovitz’s only recorded political donations had been $5,200 to the failed 2014 House bid of Eldridge in New York, who lost his race by 30 points.

Only Steyer has given more this year to Democrats, campaign finance records show. The Californian has put up almost $40 million so far, to promote environmental issues and help elect Clinton and other Democrats.

Steyer is worth far less than Moskovitz however, with a net worth of just $1.61billion.