Front cover of the 5th printing, February 1968
From Wikipedia:
On Aggression (German: Das sogenannte Böse. Zur Naturgeschichte der Aggression, “So-called Evil: on the natural history of aggression”) is a 1963 book by the ethologist Konrad Lorenz; it was translated into English in 1966. As he writes in the prologue, “the subject of this book is aggression, that is to say the fighting instinct in beast and man which is directed against members of the same species.”
The book was reviewed many times, both positively and negatively, by biologists, anthropologists, psychoanalysts and others. Much criticism was directed at Lorenz's extension of his findings on non-human animals to humans.
The first Bantam Books edition was published in 1967, featuring Tension for the title.
Back cover of the 5th printing, February 1968. The secondary typefaces are Franklin Gothic Extra Condensed – heer with sign painters’ quotes – and Century Expanded.
Front cover of the 10th printing, after March 1970. The secondary typefaces here are regular-wide Franklin Gothic and Caledonia, both in all caps.
Back cover of the 10th printing, after March 1970