This is actually not true for the majority of the world's legal systems.
Previous verdicts are something that matters for a _Common_ Law legal system, which is only a small part of the world's legal systems. (See the pink countries in the world map referenced [0])
The majority of the world's countries follow a _Civil_ Law system, where verdicts are based on the court's judgement against the written law, civil law is a sort of descendent of the Roman law system.
Previous verdicts are something that matters for a _Common_ Law legal system, which is only a small part of the world's legal systems. (See the pink countries in the world map referenced [0])
The majority of the world's countries follow a _Civil_ Law system, where verdicts are based on the court's judgement against the written law, civil law is a sort of descendent of the Roman law system.
[0] https://en.wikipedia.org/wiki/Common_law#/media/File:Map_of_...