The enlargement of the labour law application area in the post-industrial system. 2. The enormous growth of differences in productivity between workers and its consequences on the employer's safety obligation. 3. Depressive disorders as a typical professional risk in the post-industrial system and the employer's prevention responsibility. 4. Harassment in the work-place as a typical pathologic consequence of the de-standardization of jobs. The specific employer's prevention responsibility in this field. 5. A conclusive remark.