Plato (427BC—347BC), one of the greatest philosophers of all time who had an exceptional denial-free thinking mind which threw as much light as was possible in his pre-scientific times upon every aspect of the human condition.
French philosopher Jean-Jacques Rousseau (1712—1778) was a denial-free thinker who acknowledged the existence of our species' original, uncorrupted, innocent, instinctive orientation to living cooperatively and unconditionally selflessly.
Prophetic English poet and painter William Blake (1757—1827) who famously prophesised in his 1790 poem 'The Marriage of Heaven and Hell' that ‘When the doors of perception are cleansed, man will see things as they truly are. For man has closed himself up, till he sees all things through narrow chinks of his [human condition-afflicted, alienated] cavern’.
English poet laureate William Wordsworth (1770—1850) whose 1807 poem 'Intimations of Immortality from Recollections of Early Childhood' is one of the most honest and insightful poems ever written. Wordsworth recognised the nature of the conflict between our moral instinctive self and newer conscious self.
German philosopher Arthur Schopenhauer (1788—1860) was a denial-free thinker who wisely recognised that an important idea or truth must ‘endure a hostile reception before it is accepted’ when he said ‘…First, it is ridiculed. Second, it is violently opposed. Third, it is accepted as being self-evident.’
Charles Darwin (1809—1882) who put forward the idea of natural selection in his seminal 1859 book, 'The Origin of Species by Means of Natural Selection'. What was so significant about Darwin’s breakthrough in terms of being able to explain the human condition is that once we knew instincts were only orientations we were in a position to realise the basic difference between our instincts and our intellect.
Danish philosopher Søren Kierkegaard (1813—1855) was one who was brave enough to write about the human condition, describing the horrific depression that came from trying to confront the ‘tormenting contradiction’ as being so great that it is equivalent to a living death in his aptly titled 1849 book 'The Sickness Unto Death'.
The renowned South African writer, Olive Schreiner (1855—1920) bravely admitted the significance of nurturing in human life. One of the rare denial-free, unevasive female thinkers, she wrote amazingly honestly about the vulnerability of children in her 1883 book, 'The Story of an African Farm'.
Austrian physician, Sigmund Freud (1856—1939) was one of the brave few who dared to plumb the depths of the issue of the human condition. Freud gave major impetus to the process of de-throning evasive intellectualism and re-emphasising truthful, soulful instinctualism by acknowledging the existence within humans of a subconscious, innate self that is not under the control of our rational mind.
Among the most prophetic works of the Australian poet A.B. ‘Banjo’ Paterson (1864—1941) is his celebrated 1985 poem 'The Man From Snowy River', which prophesised that the human condition would be solved by an Australian.
Jan Smuts (1870—1950), great South African denial-free thinker or prophet, statesman, philosopher and scientist, who introduced the concept of 'holism', which recognises the truth of integrative meaning, in his 1926 book 'Holism and Evolution'.
Eugène Marais (1872—1936). South African lawyer, naturalist, poet and writer who was the first to study primates in their natural habitat, described the emergence of the conflict between instincts and intellect in his remarkable 1930s book, 'The Soul of the Ape'.
Famous psychoanalyst Carl Jung (1875—1961) was one of the rare few individuals who did manage to defy the practice of denial of the human condition and by so doing plumb its depths.