The tango is the result of a combination of Rioplatense Candombe celebrations, Spanish-Cuban Habanera, and Argentinean Milonga. The tango was frequently practiced in the brothels and bars of ports, where business owners employed bands to entertain their patrons with music.
The tango then spread to the rest of the world. Many variations of this dance currently exist around the world.
The tango consists of a variety of styles that developed in different regions and eras of Argentina as well as in other locations around the world. The dance developed in response to many cultural elements, such as the crowding of the venue and even the fashions in clothing.
The styles are mostly danced in either open embrace, where lead and follow have space between their bodies, or close embrace, where the lead and follow connect either chest-to-chest (Argentine tango) or in the upper thigh, hip area (American and International tango).
On August 31, 2009, UNESCO approved a joint proposal by Argentina and Uruguay to include the tango in the UNESCO Intangible Cultural Heritage Lists.
According to en.wikipedia