The theory was proposed in 1929 by the American demographer Warren Thompson, who observed changes, or transitions, in birth and death rates in industrialized societies over the previous 200 years.
这个理论是由美国人口学家沃伦 · 汤普森在1929年提出的，他观察和研究过在过去2两个世纪里工业化社会的出生率和死亡率的变化或转变。