Peer-to-peer persuasion is a necessary tool right now.

Ezra Klein discusses reactions to his recent episodes with Mahmoud Khalil, Philippe Sands and Yoram Hazony.

Deepfakes are getting more realistic, and more difficult to stop. Congress needs to take steps now.

In Oklahoma City we’re not put off by rhetoric about reverse discrimination that attacks equal opportunity and celebrations of our residents’ unique identities.

Heat waves are increasingly dangerous for those without water, shade and air-conditioning.

Even as the president is putting on a show, he’s also doing everything he can to reach his ultimate aim.

It is going to be up to states, the courts and ultimately the American people to stop the president’s attempt to further erode American democracy.

We must find a way to speak in a common language again, a language that has a name for everything, even for a person holding a photograph of a dead child.

Trump doesn’t feel any gut need to bring Ukraine into the West or understand that Putin’s invasion of that country was just his latest march to break up the West.

Readers weigh in on the Ukrainian president’s meeting with President Trump and European leaders. Also: When teens vote.

And while we’re at it, let’s think about the phrase “land swap.”

The president is driving the tentacles of the federal government deep into the nation’s economy, culture and legal system.

The group discusses artificial intelligence, phones and how students have changed over time.

Tampering with official statistics leads to bad situations.

Just as manufacturing towns failed to recognize the looming threat of new technology, cities now risk underestimating the disruption of artificial intelligence.

Science has yet to find a clear path to building intelligence that surpasses that of humans.

Data can easily be manipulated to show causation that doesn’t exist.

As the world’s powers turn away from the continent, Kwame Nkrumah’s vision for Africa may hold the key to realizing its potential today.

By putting the interests of what Trump calls “peace” ahead of the interests of freedom, we are all but guaranteeing that Ukraine will lose both.

Readers condemn the Trump administration’s plans to remove some Smithsonian exhibits. Also: Secrets of aging well.

If we bedeck him more, maybe he’ll bedevil us less.

In a climate-twisted summer, a garden runs riot.

The medical profession has clear rules and responsibilities. What about the chatbots?

Giving up on mRNA is a dangerous decision.

The I.R.S. just needs to get the details right.

The meeting was a stark reminder of a simple truth: The real barrier between President Trump and peace in Ukraine is Vladimir Putin.

The president wants to unleash American artificial intelligence companies on the world, but Europe can still stand in his way.

Readers discuss definitions of death in the context of organ donations. Also: Addressing sexual abuse at Uber.

Farmers thought they’d benefit greatly under Robert F. Kennedy Jr.’s goals for Americans’ health. They’re not so sure anymore.