In the late 20th century, a major challenge to the American labor movement was the declining size of the American industrial base, particularly traditional industries such as steel and heavy machinery. In some instances, lower labor costs have helped foreign companies in such fields as automobiles and electronics to gain larger shares of the American market. Many large U.S. factories have closed, and large numbers of union members have lost their jobs.
Automation is a continuing challenge.
Many older factories have been introducing automatic machinery to perform tasks previously done by workers. This is done mainly to increase productivity, in response to the challenge of foreign competition. But in some cases it has meant the elimination of jobs. In response, unions have sought a variety of measures to protect jobs and incomes, including free retraining and shorter work-weeks to share the available work among employees. Nevertheless, the shrinking of the traditional American industrial base was a powerful blow from which the labor movement has yet fully to recover.