Short answers, pulled from the story.
Slavophilia was a 19th-century Russian intellectual movement that called on the Russian Empire to develop from its own early history and values rather than imitating Western European institutions. The movement originated in Moscow in the 1830s. Its founders believed the Russian Orthodox Church and rural communal traditions should take precedence over Western imports such as industrialization and rationalism.
The central figures of Slavophilia were the philosopher Aleksey Khomyakov, born in 1804, and Ivan Kireyevsky, born in 1806. Together they developed the movement's core doctrine, including the concept of sobornost. Konstantin Aksakov, born in 1817, was also among the movement's leading thinkers.
Sobornost, coined jointly by Kireyevsky and Khomyakov, refers to organic unity and integration. The concept held that opposing groups should focus on what they share in common, placing collective welfare above individual interests. Slavophiles saw sobornost embodied in the peasant obshchina, the communal village institution of 19th-century Russia.
Slavophiles were hostile to Poland because Polish identity was rooted in Roman Catholicism and Western European culture, both of which the movement opposed. Poland had ceased to exist as a state in 1795 after three neighboring powers, including Russia, partitioned its territory. When the Polish uprising of 1863 began, Slavophiles used anti-Polish sentiment to build Russian national unity and abandoned the idea of a pan-Slavic cultural union.
Pochvennichestvo was a conservative version of Slavophilism developed by Fyodor Dostoyevsky, Konstantin Leontiev, and Nikolay Danilevsky. The word comes from the Russian term for soil. Articulated by Konstantin Pobedonostsev, Ober-Procurator of the Russian Orthodox Church, it became the official tsarist ideology during the reigns of Alexander III and Nicholas II.
Slavophile ideas shaped the thinking of American diplomat George F. Kennan, instilling in him a view of the Russian Empire as distinct from the Soviet Union. Kennan believed that the revival of the Russian Orthodox Patriarchate in 1943 could lead to reform or even the overthrow of Joseph Stalin's rule.