More than a billion people worldwide, mostly children, do not have a legal identity. In many countries, this means they can't get access to vital services like health care and education, says legal identity expert Kristen Wenz. She discusses why this problem is one of the greatest human rights violations of our time -- and shares five strategies to ensure everyone can get registered and protected.

Kristen Wenz: What if a single human right could change the world?

What if a single human right could change the world?

A birth certificate, more than paper, is a gateway to rights and services, crucial to combating invisibility faced by one billion.

In Angola, a policy change enabling single mothers to register their children marks progress in addressing hidden gender discrimination.

Tanzania's innovative approach to birth registration, increasing coverage from 13% to 83%, showcases the power of systemic reform.