Nothing that will happen over the next ten years can undo the way the past decade's digitization of entertainment--movies, music and books--has made it difficult or impossible to control its dissemination.

FORBES: Digital Tools

White House officials worried the tape may undo the contrite image Clinton carefully built over the past two weeks with frequent public apologies about his "indefensible" and "wrong" relationship with the former White House intern.

CNN: No decision on Clinton videotapes

"When the Department for Energy and Climate Change increases its headcount, for example - as it has done every quarter over the past year - that only serves to undo the good work being done elsewhere to clean away unnecessary fat in the arteries of government, " it said.

BBC: UK Politics

That would undo all the Democrats' gains in the past two elections, putting them back where they were at the start of George Bush's second term.

ECONOMIST: The only question is just how bad it will be for the Democrats

But like everything else Mugabe achieved during his first decade in power, he has in the past few years managed to undo.

CNN: Zimbabwe schools begin fightback

It would undo, in short, the rather meagre gains of the past three years.

BBC: Fiscal cliff: Simpson and Bowles gloomy on deal chances

New Labour's immaculately crafted 1997 election campaign was built with such care because we had lost four elections in a row, had been in power for only a tiny part of the last one hundred years, and were determined to undo that past.

BBC: Philip Gould: What 'permanent campaign'?