This page presents the major steps of Piet Mondrian’s oeuvre evolution process from the first naturalistic paintings up to the last Neoplastic abstract compositions.
The visible
The artist begins to paint in accordance with the tested canons of the naturalistic painting, otherwise called figurative:
Interpreting the visible
Around 1907, the earlier landscapes of the naturalist phase are stripped of trees, houses, and any sign of human presence and seem to want to express an unspoiled nature:
At the same time the painter’s attention turns to constructions such as mills, lighthouses and church towers:
As mentioned, the horizontal landscapes emphasize an infinite unspoiled nature while the vertical buildings suggest the finite dimension in which human beings think, design and build to rise from a primitive condition of nature.
The history of mankind has been a slow and laborious process of emancipation from natural conditions ever since the Stone Age: from huts of mud and straw to houses of glass and concrete; from oxen to tractors; from an average lifespan of thirty-five years to one of seventy-five. In striving to improve their living conditions, human beings alter the landscape with architecture and transform nature into artifice (the countless objects and tools used for human life today). How are we to define artifice? Is it a natural product or only a human product?
And if mankind is part of nature, are the plastic, concrete, and aluminum used to alter the landscape and move more quickly between the continents the result of natural evolution? It seems as if nature creates a “non-nature” through mankind. A curious contradiction. Nature and “non-nature” or, as Mondrian used to say, natural and spiritual, find in the horizontal-vertical opposition a plastic equivalent.
Moreover, the existence of human beings is marked by the search for equilibrium between contradictory drives. Mankind is part of nature but distinct from it at the same time. There is often conflict between the natural instincts and what we call intellect, reason or mind, and hence opposition between a part of us that is closer to the natural world and another that often contrasts with it.
While an horizontal expansion prevails in the natural landscapes and a vertical concentration in the architectural volumes, the opposite directions interpenetrate in the figure of a bare tree:


1911 with Diagram

The painter appears to focus in this phase on expressing contrast, both with the alternation of opposing thrusts and through the use of strong colors. Yellow is opposed to pink or green; red is opposed to blue.
In the figure of a bare tree the branches extend horizontally toward the sides while the trunk holds them back toward the center.
The later abstract compositions formed by horizontal and vertical lines are already present in the figure of the treealthough still in a form veiled by appearances.

Study of Trees 1, 1912, Black Crayon on Paper, cm. 66 x 89,1 with Diagram
The visible and the invisible
Around 1912 space evolves in a cubist sense (Fig. 14 – 15 – 16).
The basic structure of the tree (Fig. 14) reappears within a rectangle at the center of an abstract composition (Fig. 16):
The relationship between horizontal and vertical, which is expressed in a rather univocal and static way (Fig. 14), multiplies and takes on ever changing combinations (Fig. 16).
The basic structure of a single tree (Fig. 14) is now expressed in abstract form (in essential terms) by a rectangle in the center (Fig. 16) while all around that rectangle the composition suggests a variety of trees or evokes the same tree seen from different viewpoints.
The rectangle in the center recalls something more stable and enduring (the spiritual) in a sea of ever changing situations (the natural):

Composition II, 1913,
Oil on Canvas, cm. 88 x 115
with Diagram
From a rectangle to a square
All this is confirmed by new works that take as their motif a pier extending into the sea (Fig. 17 and Fig. 18).
The artist probably saw the pier structure as a static and permanent element a symbol of permanence, interpenetrating with the changing flow of the sea.
From the painter’s point of view the pier appears vertical while the sea horizon is horizontal. This interaction between opposites recalls the horizontal extension of the previous land and seascapes and the vertical development of the mills and lighthouses. Permanence is invoked by the spiritual with respect to the manifold and changeable aspect of nature and the uncertain paths of human existence.
The pier develops from the bottom-center of the composition (like the tree trunk) while the sea flow expands horizontally (like the tree branches). Same as the trunk with respect to the branches, the vertical pier seems to hold and concentrate the horizontal expansion of nature (the sea):
Fig. 18: The interaction between vertical and horizontal generates a sort of rectangular area which then blossoms into a set of square proportions with one larger and more defined square in the upper center of Fig. 19:
A square form is namely an equivalence of horizontal and vertical and therefore expresses the most balanced of relationships between the changing, horizontal flow of the sea (a symbol for the natural) and the permanent presence of the vertical pier (a symbol for the spiritual).
The square form evokes the moment when opposites acquire equal measure, that is, equal value. At that point, the natural-spiritual or instinct-reason duality manifests as unity. The unforeseeable mutability of external reality and the quest for constancy and stability arising from the inner world achieve balance in the square proportion. All the surrounding signs where one aspect prevails over the other generating imbalance, find in the central square an ideal synthesis.
An invisible overall design
By reducing the ever-changing appearance of the world to a multitude of orthogonal signs, Mondrian performs an arbitrary operation with respect to our common perception of reality. However, this allows him to express on the contained space of the pictorial surface the widest diversity while maintaining something constant (the perpendicular relationship).
The process of abstraction allows the artist to contemplate the infinite variety of the world without sacrificing the idea of synthesis and unity that arises from within. Each sign is different from the other but they all share the same intimate essence (the orthogonal relationship), just as every single being in nature is different from the other but they all share same basic elements that reveal an invisible overall design.
“There is a common design to all things, plants, trees, animals, humans and it is with this design that we should be in consonance.” (Henri Matisse)
The task of faithfully representing the fleeting appearance of things has since been taken over by photography.
Evolution of the square
In Fig. 19 we can see a variety of undefined squares around the central one:

Pier and Ocean 4, 1914 with Diagram
The same relationship between a fully accomplished square and some undefined squares can be seen in a following version of the Pier and Ocean theme (Fig. 20):

Pier and Ocean 5, 1915 with Diagram
The squares which remain incomplete evoke a sense of variation (the never fully attained balances between opposites we strive for during our lives) while the central balanced square suggests the possibility to reach the ideal unity invoked by the spiritual within us.
The square proportion that took shape during the cubist phase (Fig. 20) will inform almost all the works Mondrian paints in the course of the 1920’s and the 1930’s (Fig. 21, 22, 23):
The square will be a constant element but one that is in constant flux and unstable balance between opposing directions, mutable sizes, proportions and colors.
Not a closed geometric shape
Mondrian does not see the square as a closed and pre-established geometric shape but rather the given moment in which the relationship between horizontal and vertical, that is to say, between opposite drives, reaches a certain balance which is then lost when the different aspects again start to challenge and attain predominance over one another. The balance of the composition is influenced by all the elements and not only by the square.
Just as Mondrian chose out of all the possible relations of form the fundamental one expressing the utmost contrast (horizontal-vertical), in terms of color his eye preferred the fundamental primary colors. Yellow, red, and blue seemed to him the freshest and the best able to transform the painted surface into a living and exuberant reality:
Throughout the 1920’s and during the early 1930s the compositions show a variety of square and non-square areas, now white and fully enclosed on four sides (Fig. 22, 24, 28), now blue, red or yellow opened on one on two sides (Fig. 25, 26, 27):
The square form keeps space constant while differences in its proportion and color change it. We are constantly stimulated by the unforeseeable flow of existence in everyday life and open up to innovation (different sizes, proportions and colors) on the one hand while seeking to maintain the integrity of our established equilibriums on the other (the basic idea of a square)
Every Neoplastic composition expresses this dialectic between the changing aspects of life and the human need to stabilize them and find something of greater constancy and duration.
“In art, it is important to distinguish two kinds of balance: 1) static balance 2) dynamic balance. It is always natural for human beings to seek static balance. This balance is obviously necessary for existence in time. But vitality, in the continuous succession in time, always destroys this balance. Abstract art is a concrete expression of such vitality.” (Piet Mondrian)
The waves of a sea
Between 1920 and 1942 the square form is a constant feature but in a state of continuous evolution:

New York City, 1942
Oil on Canvas, cm. 114,2 x 119,3

Diagram
In Fig. 30 we see a variety of different square forms constantly changing in size, proportions, combinations of colors and position (Fig. 30 Diagram). The form which is meant to evoke stability and permanence has merged together with the ever changing situations suggested by the lines; the spiritual has merged together with the natural. At his stage the square is always changing in appearance (suggesting the mutability of nature and human existence) but always a square, just as the waves of the sea are always new and different from one another but still made of the same water.
Nature and life still remain the primary source of inspiration for abstract art. The beauty of a flower is certainly a model to be examined and from which to learn. I am thinking of certain watercolors by Paul Klee, the enchanting fragrance of the natural colors, and the incredible wealth of forms that the world offers to our gaze. The ten thousand different lines that we see around us prove on closer examination to be a single interminable line, because in nature everything is different, manifold and one at the same time.
At this regard we shall make a concrete example:
A tree looks like a small patch of green when seen from far distance but then grows larger and reveals an increasing number of parts as we draw closer before finally displaying an enormous degree of complexity when we observe the complex structure of every single leaf. The initial green spot has become a multifarious reality. If the process is reversed, the tree loses its complexity and reverts to a simple patch of green. Depending on the positional relationship established in each case with the object observed, unity reveals multiplicity which then reverts to unity.
What is the true reality of a tree?
In a world that changes so quickly today in accordance with the changing positional relationship we establish with things, does it still make sense to paint a tree from a single viewpoint, that is, in a figurative way and claim that this is reality?
How could the art of painting represent the outer and inner reality of things observed from different viewpoints except in abstract terms?
For a detailed examination of the evolution process from figuration to abstraction and for an explanation of its existential meanings please visit: An Overview