I am running for president because we must defeat Donald Trump, the most dangerous president in the modern history of our country. But, if we are to defeat Mr. Trump, we must do more than focus on his personality and reactionary policies.

We must understand that unfettered capitalism and the greed of corporate America are destroying the moral and economic fabric of this country, deepening the very anxieties that Mr. Trump appealed to in 2016. The simple truth is that big money interests are out of control, and we need a president who will stand up to them.

Wall Street, after driving the United States into the worst economic downturn since the 1930s, now makes tens of billions in profits while forcing working-class Americans to pay usurious interest rates on their credit card debt. The top 10 American drug companies, repeatedly investigated for price fixing and other potentially illegal actions, made nearly $70 billion in profits last year, even as Americans paid the most per capita among developed nations for their prescription medicine.

Top executives in the fossil fuel industry spend hundreds of millions on campaign contributions to elect candidates who represent the rich and the powerful, while denying the reality of climate change.

Major corporations like Amazon, Netflix, General Motors and dozens of others make huge profits, but don’t pay federal income taxes because of a rigged tax system they lobbied to create.

Back in 1944, in his State of the Union speech, President Franklin Delano Roosevelt reminded the nation that economic security is a human right, and that people cannot be truly free if they have to struggle every day for their basic needs. I agree.

We must change the current culture of unfettered capitalism in which billionaires have control over our economic and political life. We need to revitalize American democracy and create a government and economy that works for all.