Throughline

More than 700 measles cases have been recorded in the U.S. in the recent outbreak, the worst being in New York. This past April, Mayor Bill de Blasio issued a public health emergency that required residents in parts of Brooklyn to get vaccinated or face a fine of $1,000. In this episode, we look back at a 1905 Supreme Court case that set a precedent for enforcing compulsory vaccinations.

Artificial intelligence, gene modification, and self-driving cars are causing fear and uncertainty about how technology is changing our lives. But humans have struggled to accept innovations throughout history. In this episode, we explore three innovations that transformed the world and show how people have adapted — and ask whether we can do the same today.

The Sunni-Shia divide is a conflict that most people have heard about - two sects with Sunni Islam being in the majority and Shia Islam the minority. Exactly how did this conflict originate and when? We go through 1400 years of history to find the moment this divide first turned deadly and how it has evolved since.

Nancy Pelosi is the highest-ranking woman in American politics. She made her first run for public office at 47 years old and went on to become Speaker of the House twice. How has she had such an enduring career, and where does her power lie? On this episode, we trace the rise of the Speaker.

A record number of Americans have died from opioid overdoses in recent years. But how did we get here? And is this the first time Americans have faced this crisis? The short answer: no.

Have you ever wondered why your smartphone or toaster oven doesn't seem to last very long, even though technology is becoming better and better? This week, in a special collaboration with Planet Money, we bring you the history of planned obsolescence – the idea that products are designed to break.

In February, President Trump declared a national emergency at the US-Mexico border. Last year, he ordered thousands of National Guard troops to the border. Is this the first time an American president has responded with this level of force? In this week's episode, the history of militarization at the U.S.-Mexico border.

Vladimir Putin has been running Russia since 2000 when he was first elected as President. How did a former KGB officer make his way up to the top seat — was it political prowess or was he just the recipient of a lot of good fortune? In this episode, we dive into the life of Vladimir Putin and try to understand how he became Russia's new "tsar."

Conspiracy theories are a feature of today's news and politics. But they've really been a part of American life since its founding. In this episode, we'll explore how conspiracy theories helped to create the U.S. and how they became the currency of political opportunists.

When Andrew Johnson became president in 1865, the United States was in the middle of one of its most volatile chapters. The country was divided after fighting a bloody civil war and had just experienced the first presidential assassination. We look at how these factors led to the first presidential impeachment in American history.