Longevity in the sense of the maximum survival time of an individual has not changed much with the progress of civilization. - Jerzy Vetulani

The expression of aggression is conditioned both biologically and culturally and it can be learned. On the other hand, proper upbringing can completely eliminate aggressive behavior, but it must be remembered that biological conditions remain present and aggression can easily be restored.

Woźniak, Olga; Vetulani, Jerzy (24 December 2011): Stań się dobrym. To się opłaca, interview. Gazeta Wyborcza (in Polish).

Cannabis, just like morphine, has its usage in medicine. It's unpardonable that authorities forbid sick people access to this medicament and in majesty of law permit to sell cigarettes.