Ok, so this is the book in english: http://www.tfcbooks.com/tesla/my_inventions.pdf
The source is at page 30:
"War can not be avoided until the physical cause for its recurrence is removed and this, in the last
analysis, is the vast extent of the planet on which we live. Only thru annihilation of distance in
every respect, as the conveyance of intelligence, transport of passengers and supplies and
transmission of energy will conditions be brought about some day, insuring permanency of
friendly relations. What we now want most is closer contact and better understanding between
individuals and communities all over the earth, and the elimination of that fanatic devotion to
exalted ideals of national egoism and pride which is always prone to plunge the world into
primeval barbarism and strife. No league or parliamentary act of any kind will ever prevent such
a calamity. These are only new devices for putting the weak at the mercy of the strong. I have
exprest myself in this regard fourteen years ago, when a combination of a few leading
governments - a sort of Holy Alliance - was advocated by the late Andrew Carnegie, who may be
fairly considered as the father of this idea, having given to it more publicity and impetus than
anybody else prior to the efforts of the President. While it can not be denied that such a pact
might be of material advantage to some less fortunate peoples, it can not attain the chief object
sought. Peace can only come as a natural consequence of universal enlightenment and merging
of races, and we are still far from this blissful realization"
