Edward O. Wilson, professor of biology at Harvard University and Pulitzer Prize winner, points out in his book The Diversity of Life that at present the earth is facing the sixth largest period of extinctions in its history. And for the first time, human beings are to blame.
普立茲獎得主、哈佛大學生物系教授威爾森，在其著作《繽紛的生命》中指出，目前地球正面臨有史以來第 6 次大滅絕，也是唯一一次純粹由於人為因素所造成的。