There is no question, then, that we are entering a time of potentially grave peril for the planet and for many of the industries that promise a sustainable long term future.
Involved with them, and of their time, there was a different set of legends, and these too breathe in Claudius's pages, a nostalgia for the republic that was never to return, not in its disordered latter days but in its prime of discipline and virtue, a remote past exemplified by heroes like Cincinnatus, who in the fifth century BC at a time of grave peril to Rome, was elected dictator.
As Brendan Gill remarked in his 1969 review of "Portnoy's Complaint": "Obscenity is a notable enhancer of life and is suppressed at grave peril to the arts".
These people, so important because of their money, are united in their belief that Israel stands in grave peril because of the neglect or hostility of Barack Obama.
With familiar gameplay and a penchant for putting its heroine in grave peril, Rise of the Tomb Raider shows enough promise to be called a genuine competitor to Naughty Dog's upcoming Uncharted 4, set for release in March 2016.
Scientists and wildlife conservation groups say the world's polar bear population, estimated at 20,000 to 25,000, is in grave peril because of climate change, which is depleting ice levels, and increased hunting and trade in skins and parts.
There are fears that Cameron's position could be in grave peril at a post-election meeting of the 1922 Committee, which has been brought forward to the Monday after polling day on 7 May, if the Tories fail to get a healthy lead over Labour in the Commons.
One set agrees that the nation is at a crossroads, transforming its government and addressing the gravest peril to its security since the height of the cold war.
Lieutenant Graziano defended the Iraqis, saying their performance improved after a "stumble". But he conceded that a pullout of United States troops would leave Diyala in grave peril.
