The movie, like the book before it, is an expertly built machine for the mass production of tears. Directed by Josh Boone 'Stuck in Love', with scrupulous respect for John Green's best-selling young-adult novel, the film sets out to make you weep - not just sniffle or choke up a little, but sob until your nose runs and your face turns blotchy. It succeeds.

We have reached a strange new place in marketing when tweets become full-page print ads.

Every art form changes, often at rates and in ways that cause discomfort to its devotees. But the arts also have a remarkable ability to withstand and absorb those changes, and to prove wrong the prophecies of their demise.

My fellow critics and I may occasionally fault a movie for departing, in detail or in spirit, from its literary source, but the grousing of a few adult pedants is nothing compared to the wrath of several million bookish 10-year-olds. Their presumed demands, and the hovering spirit of Harry's creator, J. K. Rowling, inhibit this movie as it did the first Potter film.

Those reliable axioms about the taste and expectations of the mass movie audience are not so much laws of nature as artifacts of corporate strategy. And the lessons derived from them conveniently serve to strengthen a status quo that increasingly marginalizes risk, originality and intelligence.

A piercing satire, a poignant family drama and an investigation of the competing claims of honesty, loyalty, ambition and love.

Campaign may invite a certain skepticism about democracy, but it will surely restore your faith in cinema verite.