John Martin, an American dance critic and theorist, introduced the idea of 'absolute dance' in his book 'The Modern Dance' (1933). He argued that dance, like music, can exist as an independent art form, free from the need to tell a story or convey a specific message.

Susanne Langer, an American philosopher and art theorist, believed that the primary function of dance is to create beauty. She argued that dance is a non-representational art form that uses movement to evoke aesthetic experiences in the viewer.

Rudolf Laban, a Hungarian-born dancer, choreographer, and theorist, introduced the concept of 'kinaesthetic empathy' in his book 'The Mastery of Movement' (1928). He believed that dancers and viewers can experience a sense of empathy with the movements they observe, allowing them to connect with the emotional and expressive qualities of the dance.

The theory of 'pure dance' emphasizes the idea that dance should be an abstract art form, free from the need to tell a story or convey a specific message. It focuses on the intrinsic beauty and expressive qualities of movement itself.

Bronislava Nijinska, a Russian dancer, choreographer, and theorist, viewed dance as a form of 'ritualized behavior'. She believed that dance originated from primitive rituals and ceremonies and that it retains a connection to these ritualistic roots.

The theory of 'dance as communication' explores the ways in which dance can be used to convey emotions, ideas, and messages to an audience. It examines how dancers use movement, gesture, and expression to communicate with viewers.

Merce Cunningham, an American dancer and choreographer, introduced the concept of 'space-time continuum' in his dance works. He explored the relationship between space, time, and movement, challenging traditional notions of linear narrative and fixed choreography.

The theory of 'dance as a social practice' examines the ways in which dance is embedded in cultural and social contexts. It explores how dance reflects and shapes social values, norms, and identities, and how it is used to communicate and connect with others.

Sally Banes, an American dance historian and critic, proposed the concept of 'embodied knowledge' in relation to dance. She argued that dance is a form of knowledge that is embodied and experienced through the body, rather than being purely intellectual or abstract.

The theory of 'dance as a performative art' explores the relationship between dance and theater. It examines how dance can be used to create theatrical experiences, how it interacts with other elements of theater such as music, lighting, and scenery, and how it can be used to convey narrative and dramatic content.

Yvonne Rainer, an American dancer, choreographer, and filmmaker, is credited with developing the concept of 'postmodern dance'. She challenged traditional notions of dance technique, form, and narrative, and explored new ways of creating and performing dance that reflected the changing cultural and social landscape of the postmodern era.

The theory of 'dance as a political act' encompasses the idea that dance can be used as a tool for political expression, social critique, and activism. It explores how dance can be used to raise awareness about social and political issues, challenge oppressive structures, and promote social change.

Susan Foster, an American dance scholar and critic, proposed the concept of 'dance as cultural critique'. She argued that dance can be used to critique and challenge cultural norms, values, and assumptions, and to offer alternative perspectives on social and political issues.

The theory of 'dance as a healing art' explores the therapeutic and healing potential of dance. It examines how dance can be used to promote physical and mental well-being, reduce stress, improve mood, and connect with one's inner self.

Nancy Stark Smith, an American dancer, choreographer, and educator, introduced the concept of 'somatic dance'. She explored the relationship between the body, movement, and consciousness, and developed a method of dance training that emphasizes body awareness, mindfulness, and the integration of mind and body.