<span>The concept that political decision about foreign engagement have to be based on preserving the interests of your country above all.
Realpolitik is a foreign policy ideology coming from Europe during the 19th century and is centered around nationalism.
Realpolitik is a nation-first focused foreign policy in which alliances are determined on whether or not it benefits a nation. This concept came out of Germany during their time of nation building. It suggests that alliances are important but must be strategic and important to the country. It the foreign policy is not beneficial then practically it is not a good decision for the nation to engage. </span>
Answer: His administration defeated right and left-wing anti-Bolshevik armies in the Russian Civil War from 1917 to 1922 and oversaw the Polish–Soviet War of 1919–1921. Responding to wartime devastation, famine, and popular uprisings, in 1921 Lenin encouraged economic growth through the market-oriented New Economic Policy.
Explanation:
In mathematics, the sieve of Eratosthenes is a simple, ancient algorithm for finding all prime numbers up to any given limit. It does so by iteratively marking as composite the multiples of each prime, starting with the first prime number, 2.
Songs like that encouraged the people to join the army and fight for liberty and to take pride in their nation and be patriotic and similar things. This kind of music was very popular during that time, especially since the government supported it since the government needed people to fight in world war 1 and encouraged it heavily.