有史以来,干旱、水涝、瘟疫和兵燹都给人类带来饥荒。进入二十世纪最后20年以来,世界上最广泛流行的观点之一就是:人类的饥馑问题实际上是不可能消除的。这并不是一种新的观点。1789年,罗伯特·托马斯·马尔萨斯发表了有关人口问题的全面理论;马尔萨斯人口论在十九世纪的思想界起了举足轻重的作用。他认为,人口的增长速度将达到并超过人类生产粮 All along, droughts, floods, plagues and soldiers have all brought famine to mankind. Since entering the last two decades of the twentieth century, one of the most widespread and popular views in the world is that the hunger problem of mankind is virtually impossible to eliminate. This is not a new idea. In 1789, Robert Thomas Malthus published a comprehensive theory of population issues; Malthusian theory of population played a decisive role in the nineteenth-century world of thought. He believes that population growth will reach and exceed the human production of food