U.S. Ambassador to the United Nations Nikki HaleyNimrata (Nikki) HaleyHaley: Top Trump aides tried to get me to undermine him Former UN ambassador predicts Trump won't be impeached Top Democrat: Getting Trump off the ballot wouldn't benefit party MORE kicked off a conservative conference of high school students on Monday by urging attendees to avoid inflammatory language in favor of demonstrating real leadership.

“Raise your hand if you’ve ever posted anything online to quote-unquote ‘own the libs,’ ” Haley asked at the High School Leadership Summit at George Washington University.

The vast majority raised their hands in response, and then erupted into spontaneous applause.

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“I know that it’s fun and that it can feel good, but step back and think about what you’re accomplishing when you do this — are you persuading anyone? Who are you persuading?” Haley asked. “We’ve all been guilty of it at some point or another, but this kind of speech isn’t leadership — it’s the exact opposite.”

“Real leadership is about persuasion, it’s about movement, it’s bringing people around to your point of view,” she added. “Not by shouting them down, but by showing them how it is in their best interest to see things the way you do.”

Haley, who was introduced to the audience by her son, said leadership is lacking in this country.

However, she also said those in the room Monday made her want to bet on the future.

The high school summit, presented by the conservative group Turning Point USA, is a four-day event featuring some of the most famous GOP figures in the nation, including Attorney General Jeff SessionsJefferson (Jeff) Beauregard SessionsTrump attends football game with Jeff Sessions' Alabama Senate race opponent Bradley Byrne Impeachment tests Barr-Trump relationship Tide, Tigers and Trump: President hopes for home-field advantage in Alabama MORE and Donald Trump Jr.Donald (Don) John TrumpKhizr Khan: Trump family 'has no idea what service and sacrifice is' Hillicon Valley: Facebook to remove mentions of potential whistleblower's name | House Dems demand FCC action over leak of location data | Dem presses regulators to secure health care data Facebook, YouTube to remove 'any and all' mention of potential whistleblower's name MORE

Haley used a large chunk of her speech to defend the Trump administration’s decision to withdraw from the U.N. Human Rights Council, which she called a joke.

She also criticized countries she said agreed with the United States off-the-record but would not publicly support change on the council.

“They lack the courage to make a difference,” Haley said. “They have a voice, they just refuse to use it.”

Haley, who received a standing ovation both coming and going from her speech, posed for students' pictures for a few minutes after concluding her time.

“If I can leave you with one message today: Have the courage to stand up to the mob,” she said.