Category Archives: Philosophy

Arts, Philosophy, Science

Philosophy: The Scientific Revolution

RENAISSANCE

Intro: Although the Renaissance was primarily an artistic and cultural movement, its emphasis on free thinking challenged the authority of religion, and paved the way for an unprecedented age of scientific discovery

Tradition undermined

THE Scientific Revolution began with the publication in 1543 of Nicolaus Copernicus’s De revolutionibus orbium coelestium (On the Revolutions of the Celestial Spheres), which presented evidence contradicting the notion of a geocentric universe. A description of this is given at the end of this article.

That same year, Andreas Vesalius published De humani corporis fabrica (On the Fabric of the Human Body), which overturned many orthodox ideas in anatomy and medicine. What followed was a profound change in the approach to enquiry into the natural world. Conventional wisdom, including the dogma of the Church, was no longer blindly accepted, but challenged. Even the work of Aristotle, who had initiated the idea of natural philosophy based on methodical observation, was subject to scientific scrutiny.

At the forefront of this scientific revolution were philosophers such as Francis Bacon, whose Novum Organum (New Instrument) proposed a new method for the study of natural philosophy – systematically gathering evidence through observation, from which the laws of nature could be inferred. But there was also a new class of thinkers and scientists, including Nicolaus Copernicus, Johannes Kepler, and Galileo Galilei. Galileo challenged dogma more than most by proving that the Earth orbits the Sun, and fell foul of the Church for his efforts.

The discoveries made by these scientists, and the methods they used, laid the foundations for the work of Isaac Newton in the following century, and also influenced philosophers such as Descartes, Spinoza, and Leibniz, who helped to shape the ideas of the Age of Enlightenment.

One Cause Only

Central to Aristotle’s philosophy was the concept of the “four causes” (see article). The new scientific methods of the 16th and 17th centuries rejected these, especially the concept of a “final cause”, or purpose. Instead it was proposed that there are only “efficient causes” in nature – i.e. physical causal triggers. Although this is closer to the modern idea of cause and effect, the idea had first been proposed by the Atomists some 2,000 years earlier (see article).

Laws of nature

The theories of Copernicus and his contemporaries heralded a new era of scientific discovery. Religious authority was undermined, but so too was the orthodox concept of the laws that governed the universe, which were based on Aristotelean cosmology and physics. In this new atmosphere of scientific enquiry, conventional assumptions were replaced with laws of nature derived from empirical evidence of observation and experiment.  

The New Method

Induction

Bacon described a method of scientific enquiry using the process of induction, inferring a general rule from particular instances. For example, the rule that water boils at 100C can be inferred because this is the case in every instance.

Experimentation

Often, it is not enough simply to observe in order to come to a scientific conclusion. The scientific method pioneered by Islamic philosophers involves conducting controlled experiments to get reproducible results.

Galileo Galilei once said: “In science the authority of thousands of opinions is not worth as much as the reasoning of one individual.”

Sunspots – The detailed study of sunspots made by Galileo and others showed that these are inherent features of the Sun. These observations contradicted the Aristotelean idea of the perfection of objects in the heavenly spheres.

Gravity – Although it may only have been a thought experiment, Galileo dropped two balls of different weights from the Tower of Pisa to show that they fell at the same speed. This refuted Aristotle’s assertion that heavy objects fall faster than lighter ones.

Elliptical orbits – Once it was proven that the Earth orbits the Sun, the orbits of the planets could then be explained. Kepler discovered that the orbit of Mars was not circular, but an ellipse, and concluded that all the planets had elliptical orbits.

THE GEOCENTRIC UNIVERSE

Outside the orbit of the Moon lies the celestial region in which the Sun, the planets, and the stars move in orbits at various distances from the Earth. Unlike the sublunary region, the celestial region is made from an incorruptible substance, which Aristotle calls the “quintessence”, or fifth element. According to Aristotle, the natural movement of the earthly elements is up or down, towards or away from the centre of the Earth. By contrast, the natural movement of things in the celestial region is circular. What’s more, earthly elements tend towards a position of rest, while celestial movement is unceasing. Thus, Aristotle reasoned that the stationary Earth, although imperfect, is at the centre of the cosmos.

Beyond the Moon’s orbit, Aristotle identified 55 concentric spheres to which the celestial objects are attached. As they radiate away from the Earth, the outer spheres draw closer towards perfection, stretching into spiritual realms that have no material existence. The universe, for Aristotle, is a perfect form, and cannot have come into being at any one time: it is eternal, unchanging.

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Arts, History, Philosophy

Philosophy: On Reason and Experience

AGE OF REASON AND ENLIGHTENMENT

“Reason and experience both forbid us to expect that national morality can prevail in exclusion of religious principle.” – George Washington (1732–1799)

IN the eighteenth century, the Age of Reason – characterised by thinkers such as Descartes, Hobbes and Locke during the seventeenth century – brought about a seismic shift in emphasis in philosophical thought. Massive advances were made in the natural sciences and this in turn led to a questioning of old certainties and a rush of new and often competing ideas concerning everything from how knowledge and truth can be acquired and tested to the first seedlings of notions of democracy, representation and civil liberties. The floodgates opened, characterised best by Kant’s imperative in his essay “What is Enlightenment?” The human mind was emerging from the darkness of infancy and maturing like that of an enquiring child, while Kant urged people to “dare to know”. Reason and experience became the watchwords in this new philosophy, which was more concerned with how things actually are rather than how they could or possibly should be.

However, not all enlightenment was positive. There were darker consequences of this new awakening, as evidenced by the reign of terror following the French Revolution and by the work of possibly the most morose thinker of all time, Arthur Schopenhauer, who once wrote in an essay that everyone should swallow a live toad for breakfast to guarantee they wouldn’t have to experience anything else quite as dispiriting again for the rest of the day. It would also be a mistake to think that the status quo embraced the new enlightenment with open arms. The preface quote for this article is taken from George Washington’s farewell address to the American people and illustrates that although there was an explosion in free-thinking in some quarters, the old guard – the protectors of religious-based morality – were deeply suspicious and frightened of these new ideas about how to live in and view the world.

Reading the great thinkers of reason and experience shouldn’t be difficult. Most of what they had to say seems pretty self-evident today, obvious even, yet somehow their arguments can be difficult to follow. This is largely due to the intellectual zeal with which they approached their investigations and their fervent search for one over-arching, all-encompassing system of thought. It didn’t help either that this spirit of competitiveness led to petty rivalries. The German philosopher Schopenhauer had a hatred of Hegel bordering on the pathological. This drove him to take up a position at the University of Berlin, where Hegel had a seat, just to try and prove his ideas were more popular with the students (but he failed spectacularly). Nonetheless, readers should appreciate that the philosophers of the ages of reason and enlightenment represent a pivotal point in the history of philosophy.

“Truth in philosophy means that concept and external reality correspond… Genuine tragedies in the world are not conflicts between right and wrong. They are conflicts between two rights.” – Georg Wilhelm Friedrich Hegel (1770–1831)

HEGEL

Hegel was a major figure in German idealism. His historicist and idealist account of reality was revolutionary at the time and a major factor in the development of some radical threads of left-wing political thought.

Hegel was born on 27 August 1770, in Stuttgart, Germany. He studied philosophy and classics at Tubingen, and after graduation became a tutor and explored theology. Hegel taught at Heidelberg and Berlin, where he wrote and explored philosophical and theological concepts.

His major work, The Phenomenology of Spirit (or mind), was published in 1807 and his ideas developed in other deeply complex works until his death, from cholera, in 1831.

Almost everything that Hegel was to develop over the rest of his life is prefigured in the Phenomenology, but the work is far from systematic and generally accepted as difficult to read. The Phenomenology attempts to present human history, with all its revolutions, wars and scientific discoveries, as an idealistic self-development of an objective Spirit or Mind.

His mark on history has been profound, in that his influence has spread throughout both left- and right- wing political thought. In fact, the interpreters of Hegel split into “left” and “right” camps. Marx drew inspiration from Hegel by developing the idea that history and reality should be viewed dialectically and that the process of change – the struggle – should be seen as a transition from the fragmentary towards the complete. This is a skewed development of what Hegel tried to suggest in phenomenology. However, in practical terms it is likely that Hegel may have approved of Marx’s revolutionary interpretation, as he was witness at close hand to revolutionary Europe towards the end of the eighteenth century. It is even said that he celebrated Bastille Day every year.

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Arts, Philosophy

Philosophy: Purposes in nature

TELEOLOGY

Intro: According to Aristotle, everything that exists has a final cause, or purpose – what in Greek is called a telos. In other words, everything in nature exists to fulfil a goal.

EXPLAINING things in terms of their purposes was not unusual among classical Greek philosophers, but today it stands at odds with our modern, scientific understanding of the world. To our modern eyes it is quite normal to describe a man-made object, such as a tool, in terms of its function or purpose. A hammer, for example, exists for the purpose of pounding in nails. But this is an extrinsic purpose, one that is imposed upon it from the outside. What Aristotle proposed was that everything, including everything in the natural world, has an intrinsic purpose: that is, each thing exists in order to achieve its own ends – its internal purpose. For example, a seed’s purpose is to germinate and become a plant, and trees exist in order to produce fruit.

For Aristotle, it is not only living things that exist for a purpose. Rain falls in order to moisten the ground and enable plants to grow. It is the rain’s telos to water the earth, and the plants’ telos to grow. Their purpose or goal is the reason they have come into being.

More in line with our modern thinking is the Atomists’ assertion that natural things do not have an intrinsic purpose or “final cause”: instead, their existence is the cause of other things. Rain does not fall in order to water the plants; rather, the plants use the moisture that happens to have been provided by the rainfall.

. The Unfolding World

For Aristotle, the essential property of a seed is its ability to grow. That is also its intrinsic purpose: it exists to become a plant, which, in turn, exists in order to produce seeds. Living things are therefore characterised by their tendency to move or change, and to reproduce. And, since all terrestrial things are imperfect and impermanent, beings not only grow, but also eventually perish and decay.

. Causation

Aristotle’s theory of causation is based on his idea that everything has four causes. What we usually think of as a cause – that which makes a thing happen – is what Aristotle calls an “efficient cause”. For example, a person who pushes a rock downhill is the efficient cause of the rock’s movement. The purpose, or “final cause”, of its movement – why it goes downwards instead of up or sideways – is that it is seeking the centre of the Earth. The final cause of the action of pushing the rock is to see how far it will roll. The rock’s movement is also determined by formal and material causes.

Efficient Cause – in this example, the efficient cause is the person who pushes the rock. The rock moves because of the person’s actions.

Material Cause – This is the rock’s physical composition. The rock is made of earth, and so, because earthy things seek the centre of the Earth, it moves downwards.

Formal Cause – The shape of the rock’s trajectory is determined by the landscape. The rock’s rolling and bouncing are caused by the slopes and bumps of the hill.

Final Cause – The rock comes to rest when it reaches the closest it can get to the centre of the Earth – the bottom of the hill.

THE UNMOVED MOVER

Aristotle’s universe had no beginning, but he believed that something must have set the heavenly bodies in motion, since everything is caused by something else. However, this raises two questions: What caused that cause, and what moved the mover of the Universe? Aristotle proposed the idea of a first cause, an “unmoved mover”, responsible for all the motion in the universe.

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