Since then Nato has used its defensive role to justify a more proactive approach to "out of area" activities - arguing that instability in any part of Europe would constitute a threat to its members.

BBC: Profile: Nato

This development generates economic benefits for many low-income families, but the growing commercialisation may at the same time constitute a threat to the many traditional expressions.

UNESCO: Intangible Cultural Heritage

"This amendment seeks to put specific restrictions on the ownership of Channel Five, which would create a concentration of power in any industry and in the communications industry it would constitute a threat to our democracy, " said Lord McNally.

BBC: Rupert Murdoch

It is whether he should be ruled out on the basis that a President Erdogan would constitute the biggest threat to the secular republic since its foundation in 1923.

ECONOMIST: Turkey's presidency