you sound like this guy
this dweeb totally misses the fact that realpolitik IS all based on transactional relations.
Further since that interaction helps both (or more) states - the likelihood of more and more cooperation is the logical outcome. no formal alliance needed.
However Putin has said that if pushed far enough, he would make a military alliance if no other recourse
Never heard of "Scott Barrier", nor fathom why his opinion should matter to me.
Realpolitik was in its glory days in the 1930s.
The Nazi-Soviet non-agression pact was a preeminent example of realpolitik. Neville Chamberlain, Benito Mussolini, Josef Stalin all played some form of realpolitik.
I do not see realpolitik as the glory days of international relations.
For whatever its flaws were, we established a new world order after WW2 which was based on respect for international law and norms of conduct, and non-aggression except in self defence. Those principles were not always upheld, but the aspirational goals were exactly what we should aim for.
Natural law, natural rights, human rights, national sovereignty are all embedded in the UN charter, the International Declaration of Human Rights, and the canon of international law laid dowm subsequent to 1945.
Realpolitik undermines all of that hard won effort.
Realpolitik makes the world more dangerous, not less.
Vladimir Putin's invasion of Crimea, and the precedent it sets, in no way, shape, or makes the world a safer or more stable place.
Trying to place the blame on a British destroyer is a complete diversion.