the christchurch call to action summit (also called the christchurch call), was a political summit started by new zealand prime minister jacinda ardern that took place on 15 may 2019 in paris, france, two months after the christchurch mosque shootings of 15 march 2019. co-chaired by ardern and president emmanuel macron of france. the purpose was to "bring together countries and tech companies in an attempt to bring to an end the ability to use social media to organise and promote terrorism and violent extremism".