“The student of biology is often struck with the feeling that historians, when dealing with the rise and fall of nations, do not generally view the phenomena from a sufficiently high biological standpoint. To me, at least, they seem to attach too much importance to individual rulers and soldiers, and to particular wars, policies, religions, and customs; while at the same time they make little attempt to extract the fundamental causes of national success or failure.”
Quote by Ronald Ross
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“Therefore to the same natural effects we must, as far as possible, assign the same causes.”
Source: Newton's Principia: The Mathematical Principles of Natural Philosophy
Source: Isaac Newton: Philosophical Writings
Source: Collected Works of Sir Arthur Conan Doyle (Delphi Classics)
Source: 'Life and Death of Mr Badman' and 'The Holy War'
“Disease may also be thought of as the negation of the normal.”
