The apex of Renaissance was around the middle of the 15th-16th centuries. Learned men freely communicated with the feeling of belonging to a whole that was shared by their minds and by definition borderless. No other man better symbolises the community of minds that hovered the geographical expression called Europe than Erasmus of Rotterdam. Then came Martin Luther and decades of religion wars. Other wars sought to establish ever stronger national identities. The common language itself - Latin - still…