The objective of this work is to draw attention to the impact of climate change on internal displacement as an important factor affecting the security of millions of inhabitants of our planet. Relevant considerations have been preceded by an analysis of the most important causes of internal displacement. In the next section draw attention to the historical examples of long-term displacement caused by climate change. Environmental factors and declining resources have been the root cause of migration over most of human history. Only the consequences of the Neolithic (r)evolution and the gradual emancipation from the forces of nature resulted in a greater diversity of contemporary migrations.