**7. Conclusions**

Although the environmental extremist groups have not ye<sup>t</sup> resorted to direct violence (targeting humans), and the animal rights groups have reached for it very rarely, the phenomenon itself and some aspects of ideology can induce, in certain circumstances, such as a growing ecological catastrophe, further departure from the anthropocentric perspective, a change of the potential of radicalism within the environmental and animal-rights movements. In the case of animal-rights groups, the principle of not causing harm to people may be openly rejected, and in the case of environmental groups, the actions aimed at the annihilation of the whole human species may be undertaken. This change may result in more extensive actions, and eventually major incidents and disasters. The will and threats from all radical organizations should be taken into serious considerations, and preventive measures should be established to prevent a future catastrophe.

**Funding:** This research received no external funding. **Conflicts of Interest:** The author declares no conflict of interest.
