By the middle of the 19th century the natural and social sciences had reached such a level of development that it was possible to create a truly scientific philosophy – a science about the most general laws of development of nature and society . The natural sciences showed that the world had not been created by anybody , but had developed according to its own laws . For example , physics discovered the law of universal gravitation which governs all natural phenomena , while chemistry discovered the law of conservation of matter , according to which nothing is created in the world and nothing disappears without leaving a trace , everything merely changing the form of its existence . The advance of natural sciences helped the further development of materialism and dialectics . The greatest contribution to materialist philosophy was made by the German philosopher Ludwig Feuerbach ( 1804 1872 ) . Georg Wilhelm Friedrich Hegel ( 1770-1831 ) , another German philosopher , generalised the method used by the modern sciences in analysing the phenomena of nature and society and raised dialectics to a new level ; according to Hegelian dialectics everything must be considered from the point of view of continuous change and development . However , neither Feuerbach nor Hegel could create a truly scientific philosophy . Feuerbach , for example , did not recognise dialectics and thereby rejected the method of cognition used by science , whereas Hegel adhered to idealist positions and persisted in the opinion that , according to the laws of dialectics , it was not nature and society , but some Absolute Idea that developed . Moreover , he limited the development of this idea to the creation of the Prussian constitutional monarchy , considering it the highest expression of the Absolute Idea and the acme of development of society .