sentences:  Western Europe's use of coal as an energy substitute for wood in the mid-19th century gave it a major head start in modern energy production.In the twentieth century, the Great Divergence peaked before the First World War and continued until the early 1970s; then, after two decades of indeterminate fluctuations, in the late 1980s it was replaced by the Great Convergence as the majority of Third World countries reached economic growth rates significantly higher than those in most First World countries.The term "Great Divergence" was coined by Samuel P. Huntington in 1996 and used by Kenneth Pomeranz in his book "The Great Divergence