On Monday, Tony Blair addressed a military think tank in London and stated that the West should continue to intervene in countries under threat from Islamist extremism. According to the former PM, who led Britain as it joined the American invasions of Iraq and Afghanistan, an isolationist policy would serve no purpose because:

Islamism, both the ideology and the violence, is a first-order security threat and, unchecked, it will come to us even if centred far from us… Its defeat will come ultimately through confronting both the violence and the ideology, by a combination of hard and soft power.