Lefebvre says that there is no single theory of space – only “bits and pieces of knowledge”.  In order to understand space, we need a single unitary theory, in which separate “fields” are united. He believes these fields are the physical (nature, the world), the mental (logical and abstract ideas) and the social. These can also be simplified into Lefebvre’s Conceptual Triad – space we can touch, see and feel, space in our heads and space that we experience through signs and symbols.

The human habitat and the spaces within which we socialise are controlled by architecture, as well as economists, planners and politicians. This effects and controls the way we experience a space. Lefebvre believes that if a theory of unity of space were to be developed, citizens would be able to regain control of the space.

The substance of the world can be summarised by energy, space and time. When we evoke energy, the energy fills a space. When we are within a space, we know what fills it. As time moves, we know the space will change. Space considered on its own, without energy and time, is an empty abstract concept, and likewise energy and time. Energy and time exerted by the universe changes the space, allowing societies and space to coexist. Whilst this is not something we normally consider, it surrounds us constantly because we are constantly within a space.

Lefebvre considers whether theories within physics could create unity within a space, however he says that this is not possible as physics itself is a social construct that exists within a space. Lefebvre believes that Hoyle’s theory of energy is perhaps one of the best theories of unity; that no matter how big or small, energy travels in every direction. Hoyle looks at space as the product of energy, and that therefore energy can’t be perceived as something that fills a container. The existence of space is dependent on human energy, and human energy is dependent on the existence of space. We cannot separate humanity from the universe, nor can we separate the energy we exert from within a space.