"It is against this concept of the sovereign state, a state isolated by protectionism and militarism, that internationalism must now engage in decisive battle"

In this quote, Christian Lous Lange is highlighting the concept of a sovereign state, which is a nation that has complete control and authority over its own territory and individuals. He argues that this principle of a sovereign state, which is typically characterized by protectionism and militarism, is troublesome and requires to be challenged. Lange believes that internationalism, which is the idea of cooperation and cooperation in between countries, should now actively combat versus this separated and closed-off method of the sovereign state. He sees it as an important battle that must be won in order to promote worldwide unity and development. By declining protectionism and militarism, internationalism can pave the way for a more interconnected and tranquil world.