"The reason Anonymous fell victim is probably human weakness, " said Graham Cluley, senior consultant at security firm Sophos.

BBC: Hacking group Anonymous latest victim of Twitter hack

Perhaps, despite her strong will and intelligence, Barbara Cartland's human weakness was to see herself as eternally young.

ECONOMIST: Barbara Cartland

The Petraeus story is one we all know: temptation, hubris, and human weakness.

FORBES: Bridging Military and Civilian Understanding: What Petraeus Taught Us

For Father Savoldi, the case just confirms his belief in the power of evil to make the most of human weakness.

BBC: Roman Catholic priest

But many share the left's sense of human vulnerability, and a surprising number have a weakness for psychobabble.

ECONOMIST: Lexington

According to UNCTAD, the international community in 1971 recognized the existence of a category of countries whose distinctness lies not only in the profound poverty of their people, but also in the weakness of their economic, institutional and human resources.

UN: [21 Jul 2000] DEV/2253 : LAYING GROUNDWORK FOR THIRD UN CONFERENCE ON LEAST DEVELOPED COUNTRIES, PREPARATORY COMMITTEE TO MEET AT HEADQUARTERS, 24 - 28 JULY

Throughout modern history, union leaders have shown a weakness for thinking that one of their core responsibilities is to discover some new way of human living on this earth.

FORBES: Unions Tend Toward The Weird, As The Life Of Cesar Chavez Showed