Why is baseball called America's Pastime?
Although its popularity is arguably greater in Latin America and Asia now, baseball is still commonly referred to as "America's Pastime." This is partly because game was invented in the United States 180 years ago and was the dominate sport for much of the time since. But baseball is also a game obsessed with its own history, much like America is with hers and we can trace a lot of the story of baseball alongside the story of America. 

While the country was fighting itself to determine the shape of its future during the Civil War, the game of baseball was taking shape and spreading to the south by northern war prisoners. After the war, when mass market commercialism became available, baseball and its products were the primary sport marketed to people across the country. Many of the first American celebrities were in fact baseball players, their faces and names seen by millions of people through the rising circulation of newspapers and distribution of baseball cards.

Even later, baseball was at the forefront of the Civil Rights Movement. Jackie Robinson became the first Black player to play Major League Baseball in the modern era. The integration of baseball was an early and important step in the broader Civil Rights Movement. Since then, baseball has been one of the most diverse sports in the world, its demographics closely representing that of the whole country.

In many ways, baseball culture has become synonymous with American culture in general. The season takes place through summer. There are hot dogs, nachos, a lot of sitting around, fireworks, and games on 4th of July.

So even as more countries and cultures find a way to make baseball their own, the sport can always claim its place as America's Pastime.
Instruction: Why is baseball called America's Pastime?
Context: 
Response: Although its popularity is arguably greater in Latin America and Asia now, baseball is still commonly referred to as "America's Pastime." This is partly because game was invented in the United States 180 years ago and was the dominate sport for much of the time since. But baseball is also a game obsessed with its own history, much like America is with hers and we can trace a lot of the story of baseball alongside the story of America. 

While the country was fighting itself to determine the shape of its future during the Civil War, the game of baseball was taking shape and spreading to the south by northern war prisoners. After the war, when mass market commercialism became available, baseball and its products were the primary sport marketed to people across the country. Many of the first American celebrities were in fact baseball players, their faces and names seen by millions of people through the rising circulation of newspapers and distribution of baseball cards.

Even later, baseball was at the forefront of the Civil Rights Movement. Jackie Robinson became the first Black player to play Major League Baseball in the modern era. The integration of baseball was an early and important step in the broader Civil Rights Movement. Since then, baseball has been one of the most diverse sports in the world, its demographics closely representing that of the whole country.

In many ways, baseball culture has become synonymous with American culture in general. The season takes place through summer. There are hot dogs, nachos, a lot of sitting around, fireworks, and games on 4th of July.

So even as more countries and cultures find a way to make baseball their own, the sport can always claim its place as America's Pastime.