This was a workshop which I organised. Basically chocolate was used to teach participants how our wants and desires actually cause conflict and often hate.
The chocolate beans we used was from Ghana. If purchased directly from the farmers, this enables them to receive the western economy directly. However beans should be bought for the price they are worth. However because we do not want to pay over the top for a bar of chocolate the price at source is kept very low, but the price is still quite high for pure chocolate.
What is pure chocolate? The bitter the chocolate the nearer it is to pure chocolate. Adding a pint and a half of milk is not pure chocolate, probably not even chocolate - just a thought.