All of humanity depends on a harmonious relationship-interdependence- of individual actions that benefit society as a whole and support an organized society. Interdependence is made possible by the bond between human beings which is their common intelligence and language which makes the abstract intelligence of the community possible. (Montessori, Mario Jr).

“All is strictly related on this planet… To speak afterward of the life of man on the surface of the globe is to speak of history. And each detail holds the child’s interest by reason of its strict relation to the others.” (Montessori, Maria, From Childhood to Adolescence, p. 21) “But all is interrelated. And what is interesting is to be able to orient ourselves among these correlations. To present detached notions is to bring confusions. We need to determine the bonds that exist between them. When the correlation among the notions, by now linked one to the other, has been established, the details may be found to tie together among themselves.” (Montessori, Maria, From Childhood to Adolescence, p. 55) “And finally in the present epoch, the union of all humanity seems to have been reached unconsciously, for today man exchanges not only the produce of his material activity but also the thoughts, the discoveries, and all the products that arise from the work of pure intelligence. One thing is very clear today; that humanity is effectively united.” (Montessori, Maria, The Child Society and the World, p. 106)