Nothing is so inimical to piracy as peace and good government; and nothing so encouraging to it as prolonged jealousies and strife between peoples. The conditions of the Baltic world on the eve of the Union of Kalmar were peculiarly conducive to piracy. Both Denmark and Mecklenburg, cleverly aware of the advantages to be gained from such an external threat, instigated piratical activities and profited by them. The merchants of the Hanseatic League, whose trade suffered irreparable losses therefrom, consistently objected to this practice and served notice that those who dared harbor the pirates were equally guilty of the crime. No one, however, took this seriously; for in reality the Hansa merchants found themselves hemmed in by plots and counterplots of the various dukes of Mecklenburg and Queen Margaret of Denmark. The political intrigues served as the main incentive to piracy, and the pirate knew how to make advantageous use of the situation. For while he had to be able to handle his ship in storm and combat as well as to control his ruffian crew, and know the sheltering harbors, he had also to employ the arts of the diplomat and provide himself with safe markets on shore for his stolen wares. The physical conditions of the Baltic served his purposes well and made a success of his nefarious trade — nests of islands offering creeks and shallows, headlands, rocks and reefs, facilities for lurking, for surprise, for attack, and for escape. While we have no journals, no diaries, describing the daring deeds of the pirates, we have letters, minutes of meetings, and reports of the merchants, in the Hansa archives, together with a few chronicles and the official records of the political states — a mass of literature revealing the intrigues and plots which made use of piracy in Queen Margaret's time.