زندگى تحت توفيقات اصول اخلاق - مكارم شيرازى، ناصر - الصفحة ١٤٣ - Monkery among Christians
?stinu llams eht morf tinu lufrewop dna taerg a mrof nacew woh taht si efil laicos eht ni eussi lacitirc tsom ehT
Man's society has been in the form of various small andgreat units from the beginning days.
Following affairs have caused this variety and scattering.
١ -Race
First of all, development of family and branching of differentf amilies from one family has been the origin of formation of a race, tribe and consequently a social unit, and in fact the first social color of man is the same color of race and tribe, and at present too, in the retarded societies, the issue of tribe and race forms the foundation of society, and in some cases, it is so strict that mixing of bloods of two tribes is strictly forbidden.
٢ -Geographical area
Different tribes, which were separated by race and blood, were gradually mingled, and formed the greater social units, being separated by various geographical areas.
At the beginning, geographical borders had a natural aspect, for example, a valley or big river and or high mountains weresufficient for separating two nations. However, it found anarbitrary aspect, and the natural borders were someho winvalidated by different contracts. Although, still in most partsof world, natural borders form the geographical borders, forinstance, the separation of Britain from France, and China fromJapan, and such like are all caused by natural borders, butsurely, the border of all countries are not determined by naturalborders.