Besides giving physical pleasure, dancing can have psychological effects. Feelings and ideas can be expressed
and communicated; sharing rhythms and movements can make a group feel unified....
It is not known when people began to dance; however, because expressive movement is so spontaneous,
because dance is almost universal, and because it is so intimately interrelated with other aspects of a culture,
it is possible that dance developed along with the evolution of our species....
Some recreational dance forms, especially in industrialized societies, are termed popular dances or social
dances. In that they are for participation, are relatively easy to learn, and generally originate from the people
rather than from a choreographer....
Taken from The Encyclopedia Encarta