DELHI — An epidemic of farmers' suicides has spread across four Indian states — Maharashtra, Andhra Pradesh, Karnataka and Punjab — over the last decade. According to official data, more than 160,000 farmers have committed suicide in India since 1997.

These suicides are most frequent where farmers grow cotton, and appear directly linked to the presence of seed monopolies. The supply of cotton seeds in India has increasingly slipped out of the hands of farmers and into the hands of global seed producers like Monsanto. These giant corporations have begun to control local seed companies through buyouts, joint ventures, and licensing arrangements, leading to seed monopolies.

When this happens, seeds are transformed from being a common good into the "intellectual property" of companies such as Monsanto, for which corporations can claim limitless profits through royalty payments. For farmers, this means deeper debts.