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The ruins of an ancient wall built in 122 AD at the northern boundary of Britannia are still clearly visible. Emperor Hadrian built the wall for border control against the barbarians in this remote part of the Roman Empire. Was it successful in fulfilling its purpose? Only temporarily; the empire eventually collapsed, and the northern tribes poured over the wall.

Overshadowed by the fireworks of the Middle East, “The drug war in Mexico was ranked 2016’s second deadliest conflict in the world, with only the war in Syria being labelled worse” (IB Times, May 10, 2017).

According to a recent study by the Pew Research Center, “Muslims are projected to be the world’s fastest-growing major religious group in the decades ahead” (PewForum.org, April 5, 2017). The study indicates that births to families which identify as Muslim are projected to surpass births of those who identify as Christian, especially in Europe.

The latest ransomware attack, called Wannacry, is said to be the largest in history. But every day, thousands of attempts are made to hack into government, business, and individual computer systems to spy and to steal data. Is nothing secure anymore?

The Guardian reported on a recent study published in Proceedings of the National Academy of Sciences about Henderson Island in the Pitcairn Islands. According to researchers from Tasmania and the UK, “One of the world’s most remote places, an uninhabited coral atoll, is also one of its most polluted...