The Great Hedge

For most of India's recorded history, salt has been both abundant and subject to taxation. This continued to be the case after the British East India Company's arrival in India, and eventually led to the cultivation of a hedge to prevent salt smuggling.

Gandhi's Salt March

When the British Empire controlled India, it used legislation like the salt tax to control the population. Learn how Gandhi's non-violent salt march triggered a wave of protest leading to Indian independence in this podcast from

It's hard to believe that anyone would trade the thriving island of Manhattan for a spice, but history is full of surprises. Find out why -- and how -- the Dutch traded Manhattan for nutmeg in this podcast from

Diamond were first found in Africa sometime in the 1860s, and have troubled the continent ever since. Check out this podcast from HowStuffWorks to learn more about the De Beers monopoly, blood diamonds and the African conflicts resulting from these gems.