Graven, about Sobieski
"Poland's foreign relations followed surely in the path of her military decline. The struggle to check the Hohenzollerns' relentless drive for independence in Brandenburg-Prussia was abandoned in 1657 at the Treaty of Wehlau. The interminable duel with Sweden, which began with the Livonian Wars and was compounded by Polish Vasas' dynastic claim, came to an end in 1660 in stalemate, at the Treaty of Oliwa. The still longer feud with Muscovy reached a similar state of apparent deadlock and mutual exhaustion at the Truce of Andrusovo in 1667. At this very point, when the Republic seemed to have reached a modus vivendi with each of her traditional opponents of the previous century, she was attacked for the first time in nearly fifty years by the Turks. And the Turkish challenge was to have momentous consequences. For Sobieski's strategic decision to concentrate all his resources on the Turkish threat, at the cost of all of the Republic's other foreign concerns, was a certain invitation for later disasters. Sobieski may have scattered the Turks, and recovered the province of Podolia, which was returned to Poland by the Treaty of Karlowitz (1699); but in so doing, he saved Vienna, and exhausted his troops in the Austrians' recovery of Hungary. He surrendered his original intention of bringing the Prussians to heel; and was forced to leave the Muscovites in their possession of Ukraine (1686). The cost far outweighted the gains. The Habsburg realm, in control of Hungary, was revived as a great power. The Prussians proceeded to gain international recognition for their independent kingdom (1701); and the Muscovites, in possession of Ukraine, were set to build the Russian Empire."
Anyone can guess who has written this?