From the 21st to the 25th of October, 2019, the IV International Seminar on Critical Thinking will be held, organized by the Universidad Veracruzana (Mexico), with the support of several universities. The challenges of training are enormous, of great significance and, therefore, difficult to solve. The coordination of all parties involved in the learning process is needed for its change and substantial improvement. Institutions are required to modify their objectives and, above all, to increase the resources allocated to them. On the part of the teachers it is convenient that they increase the sensitivity towards other ways of understanding their activity. But, and that is what matters most, that those and the students work differently, and not in a timely manner, but in a generalized way. It is precisely in the daily action aimed at improving learning where critical thinking (PC) has some things to say, due to the way of approaching and executing the essential processes of knowledge acquisition. These should always be of a double, cognitive and non-cognitive nature, and both should play their role on the board of best knowledge. The PC can address the challenges of 21st century society because it has a conception and a methodology that has improved even efficient performance, making it effective. In this sense, learning, as a whole, should have within its functions to stimulate this way of behaving, in order to train people to significantly transform our society for the common good. With this objective in mind, during these days conferences, communications, and various workshops will be held by renowned professionals from different areas of critical thinking. These days will not only be an opportunity to learn about the advances that have occurred in recent years in this discipline, but also an opportunity to enrich the applied work of different professionals. The endorsement of several universities that support the entire event will undoubtedly guarantee the interest of these conferences for academics and professionals from different countries in Latin America and Europe.