Question

What is Realpolitik?
• the concept that political decisions of foreign engagement have to be based on the best interests of all parties concerned
• the concept that political decision about foreign engagement have to be based on preserving the interests of your country above all
• the concept that a single country, acting alone, has the most realistic chance of meeting its own needs

Answer 1

• the concept that political decision about foreign engagement have to be based on preserving the interests of your country above all ;

Answer 2

Realpolitik is a form of politics/diplomacy where you don't take morals, friendships, etc, into consideration, you simply worry about what your country is gaining. It's very similar to Realism