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"Dale Carnegie (seudónimo de Dale Breckenridge, Carnegie, 24 de noviembre de 1888 - 1 de noviembre de 1955) fue un empresario y escritor estadounidense de libros que tratan sobre relaciones humanas y comunicación eficaz.
Carnegie fue promotor de lo que en la actualidad se conoce como asunción de responsabilidades, aunque esto solo aparece puntualmente en sus escritos. Una de las ideas centrales de sus libros es que resulta posible cambiar el comportamiento de los demás si cambiamos nuestra actitud hacia ellos."