There were the assistants, who said they were warned to remain silent as they chauffeured female guests to their superstar employer’s Chicago-area mansion.

The associates, who quietly passed out his phone number to women and girls at his concerts, encouraging them to contact him and scheduling their visits.

And the managers, one of whom described carrying out a plot to illegally marry the R&B star, R. Kelly, to a 15-year-old girl who thought she might have been pregnant with his child.

The first two weeks of testimony in Mr. Kelly’s trial in Brooklyn have been filled with graphic descriptions of sexual misconduct against women and girls — accusations that have followed Mr. Kelly, 54, for decades. But at the center of the case against Mr. Kelly is the network of associates, assistants and other employees who prosecutors say helped Mr. Kelly build an ecosystem of torment and abuse.

Mr. Kelly, whose real name is Robert Sylvester Kelly, has pleaded not guilty to the federal charges against him in New York and denies all of the accusations of misconduct. He faces a broad racketeering case that portrays him as the kingpin of a criminal scheme that was meant to boost his music and professional brand, but also recruit women and underage girls for sex.

“It’s so easy for us to be caught up in the juicy details around the perpetrator and ignore this other narrative which, I would argue, is even more important: R. Kelly could not have done what he did for any extended period without people fixing things for him and supporting him,” said Minette E. Drumwright, a researcher and professor at the University of Texas at Austin, who has studied how networks of enablers can fuel misconduct.

Mr. Kelly is the only defendant named publicly in the indictment in New York. But the nature of the charges against him places the true focus of his trial on the machine of close managers, entourage members, employees and others who surrounded him.

Mr. Kelly’s history of sexual misconduct accusations came under renewed scrutiny during the Me Too movement. Now, his trial is one of the first of the Me Too era in which the verdict itself hinges directly on the vast networks of enablers that prosecutors say are often critical to understanding how rich and famous men can be allowed to abuse so many for so long.

Experts say that some of those who allow misconduct to persist disregard warning signs, while others play active roles. But the “overwhelming majority of enablers have made a pact with the devil and absolutely see that there’s a benefit to them,” said Amos Guiora, a professor of law at the University of Utah who has written a book on the subject.

“The impact of the enablers on survivors in many ways, long term, can be more devastating than the impact of the assaults because it’s the person that they trusted,” said Mr. Guiora, whose research included the abuses done by Larry Nassar, the former physician for the American gymnastics team.

When the Hollywood producer Harvey Weinstein was convicted of sex crimes, the limousine drivers, executives and lawyers who helped him carry out and cover up misbehavior fell under condemnation outside the courtroom. So did the industry leaders and celebrities who long knew of the accusations around him as “open secrets.”

And even as the criminal case of the comedian Bill Cosby revolved around his own conduct, observers noted that he appeared to be empowered by agents who were said to have made offers to his accusers and a gynecologist who gave him seven prescriptions of a powerful sedative, among others. (His conviction was later overturned on technical grounds.)

“These high-profile cases that are brought against Weinstein and Bill Cosby — and now R. Kelly — really put the would-be enablers on notice that they’re going to be exposed,” said Jeff Herman, a lawyer who has represented victims of sex abuse including several of Mr. Weinstein’s accusers. “I do think there’s a positive, chilling effect for the future of men who are trying to use other people to help them do wrongdoing.”

But unlike Mr. Kelly, neither Mr. Weinstein nor Mr. Cosby faced a racketeering charge that would have required prosecutors to show that the sexual abuse was part of an organized criminal operation.

The case against Mr. Kelly is anchored on six women whom prosecutors say he physically and sexually abused, though many other accusers are set to testify. They have begun to fill in the government’s portrait of an abusive system where Mr. Kelly stood at the center, and a vast number of his associates played key roles around him.