Extensive Pan-Slavism began much like Pan-Germanism, both of which grew from the sense of unity and nationalism experienced within ethnic groups after the French Revolution and the consequent Napoleonic Wars against European Monarchies.
The first pan-Slavists were the 16th-century Croatian writer Vinko Pribojević and the 17th-century Aleksandar Komulović, Bartol Kašić, Gundulić and Croatian Catholic missionary Juraj Križanić [REF].