The concept of race is as old as human beings but the racism concept mainly was evolved during the 16th century to 19the century.
It may be the start of slavery period or the ethnic and political construct during the past few centuries that resulted in the racism concept. Race is not biological in real sense but evolution of human genome. Additionally, biological nature of race depends upon the hereditary factors and the influence of natural and social environments. Physical difference in various parts of world are stronger build, weak build, short height, color etc while hereditary include the traits
acquired.
Political contradiction of race has been widely used in various parts of the world to discriminate and achieve self styled interests of economy and social uplift. History is itself evident about the various movements and prejudices done during the past few centuries over the political ground. Similarly, social contradiction is also prevalent in the world over the basis of color, facial structure, hair textures and so on.
Factors associated with the variation of race in human beings have been designated as per the attitudes and social strata of people. Society has been playing an active role in shaping the course of some opinion. And in the concept of race society has played a significant role. People assigned variations on the pretext of skin pigmentation and economy. Genetic factors are counted due to inheritance traits variation among the different regional population. Similarly, environment variations of different regions further supplement the element of race in the society. There is main factor for variation among human beings is the socio-cultural dichotomy. This factor has been the cause of rise of racism in the past few centuries.
To conclude it is a fact that racism is a vital issue and race itself has no substantive evidence biologically. And all of the human beings are equal as per the basic biological scriptures. However, nature has made few changes due to identification of human beings i.e. DNA and Genome variations etc. Social and political agendas by few interest groups during the past few centuries widened the minor variations among human beings to specific reasons. Every problem has solution and in this globalized world little pragmatic efforts with a vision of equality, respect and understanding the racism will reduce to negligible level. As there has to be difference between mankind and animals