Manchester quite rightly went ahead with the One Love concert Sunday night, rallying even after the London Bridge terror attack the day before. Going on despite the threat is one part of the answer to terrorism — as is the “Enough is enough” speech of Prime Minister Theresa May.

May, in essence, called for more of what Britain and the West have already been doing: more ideological combat with radical Islamism, more efforts to deny the enemy “safe spaces” online and in the real world, more powers as needed for security services.

Terrorism wages war on civil society: In response, society must soldier on, while doing whatever proves necessary to end the threat.

Even in the worst of Saturday’s horror in London, heroes were on the scene, including the transport cop who went after the terrorists with just his police baton and the immigrant chef who fended off one attacker with a bread basket.

Heroes were also on the scene in the besieged Philippine city of Marawi, on the southern island of Mindanao just after dawn Saturday, when local Muslims sneaked Christians in their midst past the Islamists who’ve taken over the town — telling the killers they were all Muslims and shouting “Allahu akbar” to get by.

As President Trump noted in Riyadh, the toll from Islamist terror has been far, far higher in the Muslim world than in the West — because the threat comes from one side of a civil war within Islam.

The enemy resorts to terror because they’re so badly outnumbered, everywhere. In the end, they’ll wind up in the dustbin of history as long as the forces of civilization keep calm and carry on fighting back.