Music was once a powerful force, but we have forgotten how many ways it can be used - from improving work production and healing to influencing large groups of people. In an example, work chants were used with sailors, field workers, slaves and soldiers to increase their productivity. Musical rhythms created patterns of organization and controlled movement – for an activity such as rowing a boat. Music created unity and cooperation among workers. The musical rhythm set a fast work pace. It also helped people focus on the music and not the hard, and arduous work.