quarter of the 20th century, an awareness that radical changes in musical syntax had occurred during the early 1900s caused another shift in historical viewpoint, and the change of century came to be seen as marking a decisive break with the musical past. This in turn led historians such as Alfred Einstein to extend the musical "Romantic era" throughout the 19th century and into the first decade of the 20th. It has continued to be referred to as such in some of the standard music references such as The Oxford Companion to Music and Grout's History of Western Music but was not unchallenged. For example, the prominent German musicologist Friedrich Blume, the chief editor of the first edition of Die Musik in Geschichte und Gegenwart (1949–86), accepted the earlier position that Classicism and Romanticism together constitute a single period beginning in the middle of the 18th century, but at the same time held that it continued into the 20th century, including such pre-World War II developments as expressionism and neoclassicism. This is reflected in some notable recent reference works such as the New Grove Dictionary of Music and Musicians and the new edition of Musik in Geschichte und Gegenwart. Outside the arts Sciences The Romantic movement affected most aspects of intellectual life, and Romanticism and science had a powerful connection, especially in the period 1800–1840. Many scientists were influenced by versions of the Naturphilosophie of Johann Gottlieb Fichte, Friedrich Wilhelm Joseph von Schelling and Georg Wilhelm Friedrich Hegel and others, and without abandoning empiricism, sought in their work to uncover what they tended to believe was a unified and organic Nature. The English scientist Sir Humphry Davy, a prominent Romantic thinker, said that understanding nature required "an attitude of admiration, love and worship, [...] a personal response". He believed that knowledge was only attainable by those who truly appreciated and respected nature. Self-understanding was an important aspect of Romanticism. It had less to do with proving that man was capable of understanding nature (through his budding intellect) and therefore controlling it, and more to do with the emotional appeal of connecting himself with nature and understanding it through a harmonious co-existence. Historiography History writing was very strongly, and many would say harmfully, influenced by Romanticism. In England, Thomas Carlyle was a highly influential essayist who turned historian; he both invented and exemplified the phrase "hero-worship", lavishing largely uncritical praise on