From the struggle workers wage against those (capitalists) who confuse labor with slavery. "The first Labor Day in the United States was observed on September 5, 1882 in New York City, by the Central Labor Union of New York, the nation's first integrated major trade union. "It became a federal holiday in 1894, when, following the deaths of a number of workers at the hands of the U.S. military and U.S. Marshals during the Pullman Strike, President Grover Cleveland put reconciliation with the labor movement as a top political priority. "Fearing further conflict, legislation making Labor Day a national holiday was rushed through Congress unanimously and signed into law a mere six days after the end of the strike." (Labor Day - Wiki) Nothing could be further from the truth than saying capitalism has given US workers the highest standard of living in the world. It's labor's struggle against capital that produced the American standard of living and the holiday it celebrates.