This paper addresses the relationship between pandemics and forests and discusses how forestry sciences can increase their contribution to the human-nature relationship (forests) from a perspective of complexity, redefining the disciplinary orientation they have maintained to date. For this purpose, a bibliographic review has been carried out, mainly during the COVID-19 crisis. From the review it is concluded that scientific evidence supports a close interrelation between the alteration and degradation of ecosystems (including forests) and pandemics, to avoid new epidemics it is necessary to improve the relationship between human beings and nature (forests) protecting and respecting the diversity of life forms. There are three basic approaches to the relationship between forestry sciences and forests: a product approach, a territorial approach and a biocentric approach, which consists of respecting all manifestations of life as its main focus of thought and action. Although the forestry disciplinary orientation has been and will continue to be important for the development of forest sciences, this approach is insufficient in the face of the complexity of reality, which has forests as a fundamental pillar. Hence the need to develop forestry sciences from the perspective of complexity that makes more visible the interrelationships of forests as socio-ecosystems understood as open, incomplete and far from equilibrium systems. A forestry approach that respects all manifestations of life increases its field of action and impact in the perspective of alternatives to development or regenerative development with forest bioethics.