== Common of Slavs == 

 The following phrase is deleted from intro: 
 :"The idea that the Slavic people have more in common than their origin, the origin of their languages, and some cultural aspects is derived from romantic nationalism, the panslavism movement, and the notion of ethnicity as a biological basis of nations." 

 It is a chaotiv piece of an anti-panslavist dispute, rather than a piece of information. Such a vague form has no place in the intro:  what exactly is "more in common"? This artice about ethnicity, rather than about political movements, and I fail to see what can be more than language and origin in this specific context.