Imagine a community of great possibilities and prosperity built by Black people for Black people. Places to work. Places to live. Places to learn and shop and play. Places to worship.

Now imagine it being ravaged by flames.

In May 1921, the Tulsa, Okla., neighborhood of Greenwood was a fully realized antidote to the racial oppression of the time. Built in the early part of the century in a northern pocket of the city, it was a thriving community of commerce and family life to its roughly 10,000 residents.

Brick and wood-frame homes dotted the landscape, along with blocks lined with grocery stores, hotels, nightclubs, billiard halls, theaters, doctor’s offices and churches.

Greenwood was so promising, so vibrant that it became home to what was known as America’s Black Wall Street. But what took years to build was erased in less than 24 hours by racial violence — sending the dead into mass graves and forever altering family trees.

Hundreds of Greenwood residents were brutally killed, their homes and businesses wiped out. They were casualties of a furious and heavily armed white mob of looters and arsonists. One factor that drove the violence: resentment toward the Black prosperity found in block after block of Greenwood.

The financial toll of the massacre is evident in the $1.8 million in property loss claims — $27 million in today’s dollars — detailed in a 2001 state commission report. For two decades, the report has been one of the most comprehensive documentation to reveal the horrific details of the massacre — among the worst racial terror attacks in the nation’s history — as well as the government’s culpability.

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