Perhaps the most high-profile example has been Bob Geldorf, who managed to resurrect his public profile by assuming the role of organizer of Live Aid and last year's high-profile campaign to impart guilt to westerners over the status of African poverty: sorry, to "raise awareness" of their situation.
However, as this story shows, Geldorf's exhortations and personal promises have fallen a long ways short of practical implementation: another case of encouraging awareness, making headlines and ignoring the hard graft of actual development.
Environmentalists have become the leading exponents of Marxist ideology. In the name of the environment, Africans are being told they should avoid the perils of capitalism, over-consumption and industrialization. Instead, they are informed that they will be happier if they retain their cultural traditions, their close to the land lifestyles, and resist succumbing to the malaise of western-style development: global warming.
Oh, yes: better check to see if your diamond has Leo's seal of approval. A celebrity for every dogma.