refers to the devotion for one's own nation's interests over those of
all other nations. It was an important factor in the development of Europe. In the 19th century, a wave of romantic nationalism swept the European continent, transforming its countries. Some newly formed countries, such as Germany, Italy and Romania
were formed by uniting various regional states with a common "national
identity". Others, such as Greece, Poland and Bulgaria, were formed by
uprisings against the Ottoman Empire and Russia. More concisely, nationalism better defined these countries.