Trump beat Silicon Valley at its own game. Now it must prove itself.

[Commentary] The tools of technology should strengthen, not weaken, democracy. To that end, we should require greater disclosure of the funders of online political advertisements. Tech firms also need to make heavy investments into weeding out fake accounts and false news. Even if tech companies do not adopt the journalistic standards of newspapers, they must offer readers, particularly students, some way of distinguishing fact from opinion. It’s heartening to see companies already making efforts to take some of these steps. Admitting their own shortcomings without delay and showing measurable progress will be key to earning the public’s trust.

Technology offers us hope for a new prosperity and understanding for this century. But it will take enlightened leadership. More than stock prices or product launches, Silicon Valley’s legacy will be defined by whether tech leaders step up to contribute to the larger American experiment.