Does the law save all the world?

No. The law was given to Israel, and it was also for the whole human race, but the emphatic answer is that it was not given so that all the world may become saved. The law does not accomplish worldwide salvation.

Les explains that as Israel goes into chapter 20, they are going to receive the law. He affirms the law was given to Israel, absolutely it was, but it was also for the whole human race. Yet he emphatically denies that the law was given so that all the world may become saved. He encourages listeners to look up Romans 3:20-21 after the program for further study.

Romans 3:20

Therefore by the deeds of the law there shall no flesh be justified in his sight: for by the law is the knowledge of sin.

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Was the law given only to Israel or to the whole human race?

The law was given to Israel, absolutely, but it was also for the whole human race. Yet it was not given so that all the world might become saved; the law does not provide salvation. Its purpose extends beyond Israel, but not to save everyone.