Simple English definitions for legal terms
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The declaratory theory is an old belief that judges' decisions do not create new laws, but only show what the law already is. This idea was popular in the past, but is no longer accepted. It was believed by some people who wanted to keep the power of making laws separate from the power of judging cases. It also helped to hide the fact that sometimes judges make decisions that affect things that happened in the past. Nowadays, judges still use the idea of the declaratory theory when they explain their decisions, but they also know that sometimes they do create new laws.
The declaratory theory is the belief that judges' decisions do not create new laws but only serve as evidence of what the law already is. This view was held by legal scholars like Coke and Blackstone in the past, but it is no longer accepted.
There are three reasons why the declaratory theory persisted for some time after the modern English doctrine of precedent had begun to take shape:
For example, if a court decides in December that someone is liable for their actions in January of the same year, it may appear that the court is creating a new law that applies retroactively. However, the declaratory theory would argue that the court is only stating a rule that was already in place at the time of the person's actions in January.
Overall, the declaratory theory is an outdated view of the role of judges in creating and interpreting laws.