In the 1,500-page manifesto, posted on the Web hours before the attacks, Mr. Breivik recorded a day-by-day diary of months of planning for the attacks, and claimed to be part of a small group that intended to “seize political and military control of Western European countries and implement a cultural conservative political agenda.” He predicted a conflagration that would kill or injure more than a million people, adding, “The time for dialogue is over. We gave peace a chance. The time for armed resistance has come.”