Constructivism focuses on things like foreign policy, diplomatic initiatives, etc to shape international relations and the international sphere where a country has credible influence.
In these things the focus is on domestic politics and how it shapes foreign policy with what goals in mind. It is more pragmatic with domestic political regimes as seats of international action and initiators of international action and its implementation.
Every nation and every state create a sense of national identity in various ways and nurture it through historical and cultural celebrations and means. Thus national identity is constructed and it in turn is said to influence the way the nations interact.
Basically constructivism allows for influence of national identities and its constructions on the international sphere.
A flavour or dimension is added through identity politics into international sphere and relations. International sphere can also be a place where various identities can melt into more humane understanding between people in and through the ‘give and take’ of identity respects and exchanges.
Constructivism shows that nations resist any threat to their identities, nationalism, national sovereignty that are perceived. They need not be real at all. This works against attempts to make the world a better place or to change world systems or world order.
All such attempts by other nations, however rational they may be, will be resisted if national identity is not respected. All desires to transform the world by any nation are sacrificed at the altar of identity, politics, and constructivism of other nations.
Constructivism gives more power to individual nations through its focus on national identity (rather than national interest), which is politically a more powerful instrument to having less to do with other nations in the international sphere than with what furthers and promotes its own identity.
In the 21st century there is rise of identity politics and political power arising out of it harnessed by interested parties for their own advantage. What happens in the international sphere and international relations is far from certain.
National identities based on religious domains span across countries and will be able to define international relations.
Religious “fault lines” of conflict may open up and trigger problems not only in the international sphere but within a nation itself as a result. It will spread the fire of violence and anger rather than the sparks of peace and humane relations.
Identity tensions will be strongly felt and whatever feeds identity tensions and forms them is far from allowing people to be truly free and open in shaping the one world destiny of all of human kind. We may be unconsciously constructively pursuing the “Huntington Dream” of an international conflict based on the identity politics of world religions.
Cultural identities may not all be good, but they are to be respected even when critically assessed for their role in shaping international spaces, international sphere and international freedoms.