classification and typology found in the natural sciences. The term race was often used in a general biological taxonomic sense, starting from the 19th century, to denote genetically differentiated human populations defined by phenotype. The modern concept of race emerged as a product of the colonial enterprises of European powers from the 16th to 18th centuries which identified race in terms of skin color and physical differences. Author Rebecca F. Kennedy argues that the Greeks and Romans would have found such concepts confusing in relation to their own systems of classification. According to Bancel et al., the epistemological moment where the modern concept of race was invented and rationalized lies somewhere between 1730 and 1790. Colonialism According to Smedley and Marks the European concept of "race", along with many of the ideas now associated with the term, arose at the time of the scientific revolution, which introduced and privileged the study of natural kinds, and the age of European imperialism and colonization which established political relations between Europeans and peoples with distinct cultural and political traditions. As Europeans encountered people from different parts of the world, they speculated about the physical, social, and cultural differences among various human groups. The rise of the Atlantic slave trade, which gradually displaced an earlier trade in slaves from throughout the world, created a further incentive to categorize human groups in order to justify the subordination of African slaves. Drawing on sources from classical antiquity and upon their own internal interactions – for example, the hostility between the English and Irish powerfully influenced early European thinking about the differences between people – Europeans began to sort themselves and others into groups based on physical appearance, and to attribute to individuals belonging to these groups behaviors and capacities which were claimed to be deeply ingrained. A set of folk beliefs took hold that linked inherited physical differences between groups to inherited intellectual, behavioral, and moral qualities. Similar ideas can be found in other cultures, for example in China, where a concept often translated as "race" was associated with supposed common descent from the Yellow Emperor, and used to stress the unity of ethnic groups in China. Brutal conflicts between ethnic groups have existed throughout history and across the world. Early taxonomic models The first post-Graeco-Roman published classification of humans into distinct races seems to be François Bernier's Nouvelle division de la terre par les différents