After an overview of the Left in Latin America, from the Cuban Revolution to the present day, the author analyzes the thinking of numerous political actors on the developments now taking place: the rapid development of technology and its effects on the world of work and communications; neoliberal globalization with the economic and institutional restructuring that it involves; and all the consequences, including environmental, that it implies for humanity. Recognising the profound theoretical and situational crisis of the Left, Harnecker stresses the necessity of developing an alternative to the present forms of globalization.