In the last 10,000 years, after the Ice Age, the rising sea turned the British regions into islands, largely covered with woods. Only some thousands Mesolithic hunters-gatherers roamed around. However, apparently in several waves and at several coasts, neolithic people invaded, importing sedentary life. The superior productivity of agriculture and other technology, as i tool-making, enabled the start of many aspects of civilization, such as ownership, socio-political structures and armed violence. They left the first monuments, still hard to read.