How to Win Friends and Influence People

Carnegie's century-old principles still hold because they're rooted in human nature: people crave appreciation, hate criticism, and respond to genuine interest in themselves. The book is a catalog of small social moves — using someone's name, admitting fault first, letting the other person feel an idea is theirs — that compound into trust and influence. None of it is manipulation; all of it requires sincere interest in other people.

On May 7, 1931, Francis 'Two Gun' Crowley was cornered in a New York apartment after the largest manhunt in city history. While 150 police officers fired tear gas through the windows, Crowley wrote a blood-stained letter that read in part, 'To whom it may concern: Under my coat is a weary heart, but a kind one — one that would do nobody harm.' Carnegie opens his book here because Crowley had murdered a police officer in cold blood weeks earlier and still believed himself misunderstood.

In 1921, Charles Schwab became the first man in American history to earn a million-dollar salary, paid by Andrew Carnegie at U.S. Steel. Asked why he was worth it, Schwab said it was not for his knowledge of steel manufacturing — many subordinates knew more — but for his ability to arouse enthusiasm in his men. His method, in his own words: 'hearty in approbation and lavish in praise.'

Theodore Roosevelt had a habit that struck every visitor to the White House: the night before any meeting, he would stay up reading about whatever subject most interested his guest. A botanist would arrive to find Roosevelt fluent in pollination cycles; a steel executive to find him conversant in Bessemer converters. The next morning each visitor left believing Roosevelt was uniquely interested in their world. Carnegie cites this preparation routine as the most disciplined application of his principle he has ever documented.

Andrew Carnegie wanted to sell rails to George Pullman, but Pullman's sleeper-car company was about to crush Carnegie's nascent rail division in a price war. Carnegie went to Pullman's hotel suite in New York and proposed merging their companies. Pullman asked what they would call the new firm. Without hesitation Carnegie said, 'The Pullman Palace Car Company.' Pullman's face lit up. The merger went through, the rails were sold, and the name on the door closed a deal a fortune could not have.

Carnegie tells of walking his dog Rex without a leash through Forest Hills park in Queens, where leashes were strictly required. The first time a mounted policeman caught him, he was let off with a warning. The second time, Carnegie did not wait to be confronted. He launched into preemptive self-condemnation: 'Officer, you've caught me red-handed. I'm guilty. There are no extenuating circumstances. You warned me last week.' The officer, deprived of his role as prosecutor, found himself defending the dog: 'Oh, well, a little dog like that...'

Eugene Wesson was a textile sketch designer who had failed to sell a single design to a leading New York stylist after 150 weekly visits over three years. He kept showing finished work; the stylist kept declining. Carnegie suggested an experiment: bring half-finished sketches and ask the stylist to advise on how to complete them in a way that would suit the buyer's needs. Within days the stylist had bought every design Wesson submitted — they were now his ideas. Wesson sold dozens more in the following months using only that method.

On April 28, 1863, Lincoln wrote General Joseph Hooker a letter just before the Battle of Chancellorsville. The opening lines praised Hooker's bravery, professional skill, confidence in himself, and ambition — the kind of qualities a commander needs. Then came the harder paragraphs: Lincoln's concerns about Hooker's recent statements that the country needed a dictator, his role in undermining General Burnside, his risk to the army. Hooker reportedly carried the letter in his pocket for the rest of his life because the praise made the criticism survivable.