There is a strong tradition in ecologism that argues that conventional modern science is unsuitable for explaining the current environmental crisis. Therefore it states it is neces-sary to develop a new science grounded in epistemological bases different from those of conventional modern science. Although some of the epistemological bases of conven-tional modern science are mentioned in several publications, attempts to present them in an orderly and complete way have not been found. As a result, the present paper aims at compiling the epistemological bases of conventional modern science scattered in the literature and present them in a systemized way.