I would say that Poland was just unfortunate to be in the middle of aggressive neighbors, but then look at Switzerland, it's been around for a while, in the middle of all the tyrannical empires that have come and gone...somehow they managed pretty well, and were left alone for the most part.
Yes, the Swiss were able to defend and then keep their independence. Probably the mountains helped a lot as a natural barrier to aggressors, but beside mountains the Swiss were also indomitable warriors. Though Polish gentry was obliged to answer the king`s call and go to war in times of trouble, they prefered a quiet life in the countryside. That is why, in 18 century, the most militirised country in Europe (10% of the Polish population was gentry - the descendants of medieval knights) was unable to defend itself and fell prey to its more determined neighbours.
What a paradox, really.
Yet despite being one of the most embattled group of people in Europe, The Poles somehow got their act together and reestablished Poland as one of the major economies of Europe. Wow.
Yes, it was impressive. But before it there had been millions of victims and a ruined country. If the Polish elites had been wiser, more patriotic and less corrupted in the past, Poland would come out much better.
Yet I never hear a peep out of the mouths of Poles "we've had to fight everyone to survive,,,blah blah blah." Though I guess that mostly old people would whine about that, but seeing that I don't speak Polish, I never hear of it. I guess the Poles are made of tougher stuff than most of us.
You can`t hear or understand whining because it is in Polish. But it takes place quite frequently. It is true, though, that mostly mature people like discussing Polish past misfortunes, occupations, betrayals by "friends," ingratitude of allies etc etc. Younger generations don`t care.
Yet, Polish schools still infuse this kind of rememberance patriotism into students. We were talking about scythes as the main weapon of Polish insurgents. Look at the school play about Kosciuszko Insurection