2. Why did Wakanda go into isolation?

Wakanda is home to a lot of Vibranium, one of the strongest metals in the Marvel Universe. To keep it out of the wrong hands, the ancestors isolated themselves. This idea is reinforced in Black Panther's mind when Ulysses Klaw breaks into Wakanda, kills his people, and steals Vibranium to sell to arms dealers.

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Wakanda is home to a lot of Vibranium, one of the strongest metals in the Marvel Universe. To keep it out of the wrong hands, the ancestors isolated themselves. ... If it's advanced technology were to be put into the wrong hands, like the ancestors were worried about, it would be devastating

Cathedrals served as churches for the Bishops to teach Christianity to the public and were made to deal with the masses of people that came to visit. Cathedrals also held many special occasions and events including but not limited to weddings, funerals, markets, fairs, feasts and even legal proceedings.

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