Complex sentence: Kistyakovsky saw the ultimate embodiment of the lawful state in the socialist state, which would realize all the lawful principles declared: all citizens rights would be fulfilled, people would govern the country, and solidarity would reach its summit.
Split into simpler sentences: Kistyakovsky saw the ultimate embodiment of the lawful state in the socialist state, which would realize all the lawful principles declared. All citizens rights would be fulfilled, people would govern the country and solidarity would reach its summit.