Since soap was invented about 5,000 years ago, how has the way people keep clean
changed?

Less women died after giving brith!

Explanation:

The result of washing with soap and water removes more germs than with water alone. Although soap has been around for thousands of years, in the 1840's one forward thinking doctor, Dr Ignaz Semmelweis from Hungary discovered that far less women died after childbirth if the doctor had washed their hands.

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the tariff was created to protect industry in the northern part of the united states. industries in the north were being driven out of business by imported goods that were priced at a low rate. the goal was to protect these industries   by taxing the goods.