Connor Keiser, 22, left, shows his album of historic photos of Longtown to James Jett, 90 at Bethel Long Wesleyan Church. (Maddie McGarvey/For The Washington Post)

Amid the corn and soybean fields of western Ohio lies a progressive crossroads where black and white isn’t black and white, where the concept of race has been turned upside down, where interracial marriages have been the norm for nearly two centuries. The heavy boots of Jim Crow have never walked here.

Founded by James Clemens, a freed slave from Virginia who became a prosperous farmer, Longtown was a community far ahead of its time, a bold experiment in integration.

Now that history is in danger of being lost. Longtime Longtown residents are dying, and whites are moving in and buying property. Many historically black-owned buildings have already been torn down or remodeled.

But Clemens’s great-great-great-great-great-great-great-great-grandson is working to save his family’s heritage. Though his eyes are blue and his skin is pale, Connor Keiser, 22, said that his childhood is filled with memories of “cousins of all colors” playing in the pastures at the family farm.

“We were a typical Longtown family. We all looked different, and we were taught that color didn’t matter,” Keiser said. “As long as I have anything to do with it, Longtown won’t die.”

Connor Keiser, 22, center, shows his album of historic photos of Longtown to Faith Johnson of the National Underground Railroad Freedom Center at Bethel Long Wesleyan Church. (Maddie McGarvey/For The Washington Post)

Largely because of Keiser’s efforts, the National Park Service, the National Register of Historic Places and the National Underground Railroad Freedom Center have recognized Longtown as a place noteworthy for its early embrace of racial integration and educational opportunities for blacks. But the town’s institutions are in peril.

Longtown’s former school, the Union Literary Institute, founded in 1845, has a largely forgotten history as one of the nation’s first integrated establishments of higher education. Notable alumni include the first black man to serve in the U.S. Senate, Hiram R. Revels of Mississippi. The school, which closed in 1914, fell into disrepair and until recently was used to store farm equipment.

The original Clemens farmstead is in better shape; the two-story brick farmhouse, built around 1850, still has its original fixtures and woodwork. Although the National Park Service has dispensed $25,000 to restore the property, Keiser estimated that the project will require an additional $100,000.

So Keiser has hit the road to appeal for money. He’s been drawing big crowds to area libraries with his presentation about the racial harmony of Longtown and the desperate need to preserve it.

“I don’t think the public was aware this was here,” Keiser said. “Black history is not talked about a lot in general, and I think [the fact] that we have that kind of history means something to a lot of people.”

The racial harmony of Longtown is the legacy of Clemens, who found his way here in 1818 and purchased 390 acres — probably with the aid of abolitionist Quakers, sympathetic Native Americans and, by some accounts, his former owner in Rockingham County, Va.

Clemens was of a mixed-race ancestry — black,white and Native American. So was his wife, Sophia. They served as a beacon to other integrationists, as well as runaway and freed slaves looking for succor and education during and after the Civil War.

The James and Sophia Clemens Farmstead is one of the oldest and last remaining landmarks in one of Ohio’s earliest black settlements, Longtown. (Maddie McGarvey/For The Washington Post)

The couple became conductors for the Underground Railroad and — while the rest of the nation endured Reconstruction and Jim Crow laws — built a mixed-race town that numbered close to 1,000 people at its peak in the 1880s.

But Longtown began to falter after World War II, when residents were forced to seek help from bankers to modernize their farms.

“When we began to need machinery and bank loans to expand and grow and become competitive, that’s when there was trouble,” said Carl Westmoreland, a senior historian with the National Underground Railroad Freedom Center who has visited Longtown.

“Banks would not help black farmers purchase new equipment. In Longtown, people gradually had to go to industrial centers for jobs. And if you are not part of the day-to-day energy of the community, it begins to decline.”

Today, only a handful of families remain. But Longtown lasted longer than other integrated rural villages once scattered across the Ohio plains.

“Because Longtown’s population was so much larger than others like it, it took longer for it to whittle down,” said Roane Smothers, a distant cousin of Keiser’s and an active Longtown preservationist.

“And because Longtown was so much larger, more structures have survived,” Smothers said. “As these other communities faded away, white folks bought the land and structures, and many times all that was left was the church.”

A junior majoring in international studies at nearby Wright State University, Keiser seems an unlikely savior for this blink of a town. Unfailingly polite, possessing a bright white smile, Keiser looks as Caucasian as the rest of Darke County, which was 97.7 percent white at the last census.

But Keiser doesn’t consider himself white. Nor does he consider himself black. Instead he calls himself by the dated and, to some, offensive term “colored.”

“I know who I am and what I am. I may look white, my appearance is white, but my insides are not. I know I am not white,” Keiser said. He makes it a point to tell anyone who will listen about his black ancestry. “I tell everyone about it, whether they want to hear it or not. I am so proud of it.”

The issue of race has long perplexed America. In the past year, the racial identities of high-profile black activists such as former Spokane NAACP chairman Rachel Dolezal and Black Lives Matter activist Shaun King have come under scrutiny. If birth certificates tell the story, both Dolezal and King are Caucasians trying to pass as black.

From the perspective of his own racial heritage, Keiser finds them “pretty cool. You don’t hear of many white people wanting to be black,” he said.

Not many people anywhere these days want to be called “colored.” But it’s common in Longtown.

Take Edith Perkins, 75, who also looks white. For 30 years, she worked in human resources at Alcoa in nearby Richmond, Ind., where prejudice surfaced as soon as people learned she was from Longtown.

“I was never really accepted by the whites, who viewed me as black. Nor was I really accepted by the blacks, who viewed me as white,” Perkins said. “So I ate lunch by myself for 30 years.”

Patricia Hope, 82, has snow-white hair and a fair complexion and also identifies as “colored.” She said her family has a long mixed-race lineage in Longtown.

“That’s why we worship in this church, to keep our little crossroads alive,” Hope said, referring to the Bethel Long Wesleyan Church, which still holds services every Sunday. This Sunday, the church will celebrate its 159th annual homecoming with a potluck and picnic. Every year, the event becomes larger, as former residents come back to reconnect with their heritage.

“This place is all we know,” Hope said.

Her husband, Thomas, died in 2013. One by one, the repositories of Longtown’s legacy and its stories are passing to the grave. Keiser grew up steeped in the town’s oral history, stories passed down from his great-grandfather, Maze Clemens.

“He was the keeper of Longtown’s history, and my biggest hope is to make him proud by doing the same,” Keiser said.

While Longtown itself was a haven, a refuge from prejudice, sometimes biases from the outside world would creep in. The Ku Klux Klan would visit periodically. Keiser said his great-great-great-great-grandfather was murdered by the Klan. As recently as 2003, racist notes were left on the door of the church, Keiser said. In nearby Hollansburg, Ohio, Confederate flags flutter casually from many front porches.

“If the rest of the world got along as well as we do here in Longtown, there wouldn’t be problems,” said James Jett, 90. His dark skin, smooth despite his age, contrasts with his wife Brenda’s much lighter complexion.

Jett grew wistful remembering Longtown’s heyday, pointing to cornfields that were once filled with houses. And he remembers the Tigers, the town’s semi-professional baseball team, which sent many players to the Negro leagues. The Tigers’ appearance often confounded opponents.

“The Tigers showed up to play a team in Indiana, and they said, ‘Where’s the black team?’ And they responded, ‘We are the black team,’ ” laughed Brenda Jett, who declined to give her age.

Keiser said he is driven to make sure such stories are not lost.