"Our culture has gotten too mean and too violent", she said. "It is awful when it happens on the playground, and it is absolutely unacceptable when it is done by someone with no name hiding on the internet".
Mrs Trump said: "We have to find a better way to talk to each other, to disagree with each other, to respect each other".
Pointing to the "bad side" of social media, Melania said, "As adults many of us are able to handle mean words, even lies". "It will be one of the main focuses of my work, if I am privileged enough to become your first lady".
Melania told a pretty story about her own immigration, without noting that her husband is campaigning on building a wall between the US and Mexico and has objected to providing refuge for Syrian refugees who have gone through a substantial vetting process.
But on Thursday, she is heading to Berwyn, Pa., to deliver remarks at a campaign rally, her first solo event of the cycle. "Would she just abolish the DOJ and Federal Bureau of Investigation?" A speechwriter later apologized.
"Every time my husband learned of a factory closing in OH or North Carolina or Pennsylvania, I could see him get very upset", she said as she made the case that the Republican nominee can fix the nation's economic woes. "I'm an immigrant and let me tell you, no one appreciates the freedom and opportunity more than me", she said. She described her process of becoming a legal US citizen in 2006, saying, "it was the greatest privilege in the world".
"He pledged to restore integrity to Washington, and respect for America overseas", she said.
Trump and Clinton trade jokes and insults at charity dinner
Democrats expressed dismay that the Republican nominee and his backers were advancing the idea of widespread voter fraud. Mr Trump came under fire during the debate for suggesting that he might not accept the election's outcome.
Melania Trump hasn't had a very public role on the campaign trail and has made it clear, publicly and privately, that her first priority is raising their 10-year-old son, Barron. Trump famously re-tweeted this image comparing Texas State Senator Ted Cruz's wife Heidi's appearance to Melania's.
Trump is married to Donald Trump, the Republican nominee for president who calls Mexicans rapists, mocked a disabled reporter, bragged about sexually assaulting women, tossed a baby out of a rally, and wants to ban Muslims from our country.
Trump's speech LIVE on this page.
Trump faced allegations of plagiarism as a result and the campaign later said the mistake was that of a speechwriter and not Trump herself.
In the spot, Melania (then) Knauss walks off a private jet in a baggy trench coat and proceeds to take her oath of office as an Elvis Costello tune plays in the background. Melania is the real estate mogul's third wife and mother to Donald's youngest child.
"I wanted to be an American", she said to loud applause.