A good starting point would be Hans Morgenthau's Politics Among Nations. He was a German Jewish emigre to the United States, and it was with the help of the Rockefeller Foundation that his book was used to create International Relations departments within universities across the United States in the immediate post-WWII period. Prior to Morgenthau and the Rockefellers, international relations was not its own discipline distinct from history, philosophy, law, jurism, etc. Morgenthau's book was the standard textbook for international relations for several decades, and in it he tries to outline European realpolitik for his liberal American audience. His is still probably the most literate, sophisticated, and nuanced international relations introduction.

On the topic of a systemic drive to increase ones power at the expense of others, leading to escalatory and conflictual international dynamics, your go-to book is John Mearsheimer's The Tragedy of Great Power Politics. He is also in the realist school of thought like Morgenthau, although you'll find that his style of writing is much punchier and pugilistic than Morgenthau's.

On the attempt to build systemically de-escalatory effects at the international level, I would pick up a copy of G John Ikenberry's After Victory. He describes how victorious countries following major wars would create a new set of rules for the international system, and how at least some of those post-war regimes attempted to reduce the returns to power in order to increase the stability of the system and reduce perceptions of threat and insecurity by weaker states. Note that he worked in the State Department during Bush Sr administration and has that direct experience of attempting to ensure order and stability following the end of the Cold War.

If you want to read case studies in escalation toward a war that no single actor actually wanted, I recommend Stephen Van Evera's Causes of War with a focus on his study of WWI. It goes well paired with Barbara Tuchman's The Guns of August.