Katrín Jakobsdóttir is the Prime Minister of Iceland. The views expressed in this commentary are her own. View more opinions on CNN.

(CNN) It's been almost two years since millions of women across the world used the simple, yet powerful, hashtag #MeToo. During this time, women have exposed, in various ways, the everyday nature of gender-based violence, harassment and discrimination. Drawing from the origins of the term Me Too, the movement has also drawn attention to other forms of structural inequality, involving race and class, and the persistence of multiple discrimination.

#MeToo's impact has, to be sure, varied between one country to the next; in some, it has been minimal, in others, massive. Politics, the arts, businesses and NGOs were upended. Increasingly, women who spoke out weren't automatically met with disbelief, with some perpetrators even having been held to account.

Katrin Jakobsdóttir

While public opinion has shifted, questions remain about the direction and sustainability of #MeToo. Does it represent a permanent change for the better or a small window of opportunity that will shut again, resulting in a backlash? How can we make sure the efforts lead to enduring societal change?

These are among the many problems explored at a three-day conference in Reykjavik, Iceland, which is starting Tuesday and is partly live streamed . The conference -- which is organized as a part of Iceland's presidency of the Nordic Council of Ministers -- gathers over 80 thinkers along with more than 800 participants to discuss the causes, manifestations and effects of the #MeToo movement.

As for my own country, Iceland, #MeToo has been characterized by organized groups of women who shared their stories of violence and abuse, anonymously, as a way to underpin collective demands for structural change. This act of testimonial story-telling was extremely powerful. As more women spoke out, the more marginal realities were exposed, forcing us to urgently examine places where a culture of impunity had manifested.

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