During the late nineteenth and early twentieth centuries, the industrial revolution transformed the American landscape, culture, economy, and relationships between workers and management. The transformation brought significant gains in prosperity for both workers and management, but it also meant laborers worked long hours in dangerous conditions in factories and mines. Workdays of ten to twelve hours were common, with reduction of wages during economic slumps. There was no job security, and lack of safety features led to frequent grisly accidents caused by hazardous working conditions. Workers organized labor unions to bargain collectively for improvements in pay and other working conditions. Management almost always resisted the labor union demands, and each side worked to influence laws in its favor. The United Mine Workers Union was founded in 1890, followed by several other unions organized throughout the 1890s. Also throughout the 1890s, strikes, uprisings, and sometimes violent confrontations between labor and management broke out as workers attempted solidarity in pursuit of better wages, shorter hours, and safer working conditions. Management responded to these initiatives by firing labor union leaders, hiring strike-breakers, intimidating workers, and using political influence to block any lasting legal reforms.