bet365 live casino bet365 withdrawal Discuss the development and change of social history，The foundation problem of the development of the biological power first。Production technology and production objects in the Song Dynasty、Production tools at least 45 developments，Among them, there are bet365 best casino bet365 withdrawal at least 15 items of agriculture，There are at least 30 items in the handicraft industry。The overall development level of the productive forces in the Song Dynasty exceeded the predecessor，But there are many limitations。There are 7 bottlenecks that restrict the further development of the Song Dynasty's productivity，In the Ming and Qing Dynasties, only two agricultural technology and thermal weapons surpassed the Song Dynasty，The remaining 5 items have no major breakthrough。Although Bet365 app download the total productivity is in the total productivity、Technically，Especially in the introduction of planting crops more than the Song Dynasty，But there is no major breakthrough due to production tools、Even retreating on important tools，Popularity increase，The quality of productivity and development of per capita per capita is lower than the Song Dynasty，The entire society is in stagnation and conservative state。Compared with the previous dynasties or bet365 live casino bet365 withdrawal later Ming and Qing dynasties，The level of productivity development in the Song Dynasty is all at the highest peak。Development of Society in the Song Dynasty，The stagnation of the Ming and Qing Dynasties，The rise of Europe，The first reason is the level of productivity development。