More than forty thousand readers told us what they looked for in close friendship, what they expected 【21】______ friends, what they were willing to give in 【22】______ , and how satisfied they were 【23】______ quality of their friendships. The 【24】______ give little comfort to social critics. Friendship 【25】______ to be a unique form. of 【26】______ bonding. Unlike marriage or the ties that 【27】______ parents and children, it is not defined or regulated by 【28】______ . Unlike other social roles that we are expected to 【29】______ -- as citizens, employees, members of professional societies and 【30】______ organizations--it has its own principle, which is to promote 【31】______ of warmth, trust, love, and affection 【32】______ two people. The survey on friendship appeared in the March 【33】______ of Psychology Today. The findings 【34】______ that issues of trust and betrayal are 【35】______ to friendship. They also suggest that our readers do not 【36】______ for friends only among those who are 【37】______ like them, but find many 【38】______ differ in race, religion, and ethnic background. Arguably the most important 【39】______ that emerges from the data, 【40】______ , is not something that we found--but what we did not. 【21】