What was the reason for rapid growth of labor unions in the late 1800s?

The primary reason for rapid growth of labor unions in the late 1800s was the Industrial Revolution, since this led to massive amounts of factory labor that was often dangerous for the workers involved, who had practically no rights under federal law. 

The embargo act of 1807  was a law passed by the united state congress and signed by president thomas jefferson on december 22,  1807. it prohibited american ships from trading in all foreign ports. in 1806, france passed a law that prohibited trade between neutral parties, like the u.s., and britain.