This is a deeply held survival mechanism: when we see that the leader is doing his or her best to share whatever resources exist within the group so that as many as possible can survive and thrive, we take it as an important signal that the leader cares more about the success of the group than about protecting him or herself.

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They cannot leave until white smoke emerges from the Vatican chimney -- the signal that a new leader has been picked.

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The RS line needs to move through the resistance at line c to signal that it is a market leader.

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If the party go, as some are urging, for an autumn contest, then it would send the clearest possible signal to Labour that the party and its new leader are open for business as far as a coalition goes, most likely after the local and European elections next May.

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