For many centuries, blatant, monstrous inequality reigned in human societies. A small number of rich people controlled all power. Only in the twentieth century, under the influence of the October Revolution and scientific progress, Western societies began to change towards progressive taxes and greater equality in income distribution. The level of violence has decreased, people are living longer and receiving better education. However, the reverse process is now actively underway: the world is becoming much less equal, less safe and less educated. What threats does inequality pose in the 21st century? Will we be able to avoid slipping into savagery again? French economist Thomas Piketty asks these questions in his new book. The publishing layout is saved in PDF A4 format.