Over the past fifteen thousand years the Earth has witnessed dramatic changes in sea level. The last Ice Age, when coastlines were more than 700 feet below modern levels, saw rapid global warming, and over the following ten millennia, the oceans climbed in fits and starts. These changes had little impact on the humans of the day, because the Earth's population was then so small, and those few people were more mobile than today's static populations. Global sea levels stabilised about five thousand years ago. As urban civilisations developed in Egypt, Mesopotamia and South Asia the curve of inexorably rising seas flattened out. The planet's population boomed, and by the Industrial Revolution was five times its size two thousand years earlier. And as we crowded shorelines to live, fish and trade, we put ourselves at ever greater risk from the oceans. Changes in sea level are historically cumulative and gradual, but since 1860, the world has warmed significantly and the ocean's climb has accelerated again. From the Great Flood to Hurricane Sandy, this book explores the changing complexity of the relationship between humans and the sea at their doorsteps, and shows how vulnerable our modern society is.

A history of climate change describes the dramatic evolution and stabilization of the oceans before the rise of humans approximately 6,000 years ago, tracing a significant rise in global temperatures since 1860 and how a rising sea level is affecting world populations.