The first chapter concentrates attention on the political events which took place immediately after the death of Mongol Mongke khaghan (1251–1259). It analyses in detail the struggle for the throne between Arik Boge and Kublai, which in 1264 ended in the latter's victory. As is known, this struggle began in 1260 soon after the Great quriltai convoked by Kublai in Kaiping at which he proclaimed himself great khan of the Mongol Empire simultaneously. With that gathered by his brother Arik Boge in Karakorum. It should be noted here that it was not a struggle for the throne of an ulus khan ruling a part of the empire but for that of the great khan of the whole Mongol Empire founded by Genghis Khan.

The question of the administrative structure of Mongolia in the Yuan period is discussed in the corresponding chapter. This part of the work considers the central bodies of States power in the Mongol Yuan Empire, but attention is accented mainly on administrating of Mongolia proper, which is characterized as a vicegerency where the State power was represented by the heir of the khaghan of the empire, obliged to constantly live in Karakorum. Special paragraph deals with the economic situation in Mongolia proper and the living conditions of the Mongols in their homeland.

One of the chapters of the work studies the economy and social relations of the Mongols in the 13th–14th centuries. As is known, the Mongols in that period, as well as before, were engaged in extensive cattle-breeding. The Mongol arats roamed from place to place by small groups of ayils (households) within the limits of a strictly fixed territory, included into the domain of a feudal lord. The arats were registered to his lands and had no right to leave him. In that period hunting still played an important part in the economy. At the same time, agriculture, handicraft and commerce began to develop. Economic decline of Mongolia proper in that period is accounted for the feudal wars which burst out from time to time on its territory almost during the whole Yuan rule.

The corresponding sections deal with the fall of the Yuan dynasty as a result of peasant uprisings in China and the flight of the Mongol court first to Yinch'ang in 1368 and then to Karakorum in 1378, as well as the struggle of the Mongol great khans Togon Temur (1333–1370), Ayusiridara' (1370–1378) and Toquz Temur (1378–1388) against the Chinese Ming dynasty. In this connection the work describes in detail the Mongol-Chinese relations during the post-Yuan period.

The work ends in a chapter devoted to culture and religious beliefs of the-Mongols in the 13th–14th centuries.

In this study on the Mongol history, the author makes an attempt to use as many new data, especially from Chinese sources, as possible and at the same time to adequately solve its problems, but it is up to the reader to decide, whether he has succeeded or not. Any criticism on the side of students of the Mongol history will be accepted with due consideration.