aka the weakest link: because a chain breaks if any link breaks. (Being more mechanically-minded, I prefer this less literate metaphor.) I haven't read AK; fro

aka the weakest link: because a chain breaks if any link breaks. (Being more mechanically-minded, I prefer this less literate metaphor.) I haven't read AK; from context, is that really what Tolstoy meant? Without context, the well-known quote could be read as happy families are alike in that they are happy, since, in practice, happy families are not identical.