how is the crucible regrded as a universal art ?

Miller's themes in The Crucible were well thought out universal themes. You have to remember that "universal" themes endure through the ages; they always apply to something or someone and they are acknowledged worldwide.

Miller addresses the following universal themes; reputation, empowerment, and hysteria, and each of these themes are as important today as they were in the 1600's. Reputations affect how an individual is seen, power is still a major force and desire, and mass hysteria accompanies everything from social issues to sporting events.