Christian Solidarity Worldwide Chief Executive Mervyn Thomas said that freedom of religion or belief (FoRB) is valuable to all those of different faiths and also to those who hold no religion or belief at all.
Human Rights Day is celebrated annually on 10th December to commemorate the adoption of the Universal Declaration of Human Rights.
Mervyn Thomas said: "It is a multi-dimensional right including not only the right to choose and change religion or belief, but also the right to express or manifest beliefs alone or in community with others, in public or in private.
"It is closely connected with other fundamental rights, such as freedom of expression, as all human rights are indivisible, interdependent and mutually reinforcing."
He continued: "this fundamental right remains neglected, and it is often not afforded the same status and recognition as other human rights within the international human rights mechanisms."
Mr Thomas drew attention to specific situations around the world, including the rise in targeted violence against religious minorities and individuals campaigning for religious freedom in India.
He also spoke about the fact that many conflicts have their roots in or are exacerbated by religious differences and the misuse of religion in countries such as Iraq, Syria, and Nigeria.
He said that "where FoRB is denied, other human rights violations are also likely to occur against individuals and communities."
The UK government's participation around the world was also highlighted: "In a world where violations of freedom of religion or belief undermine international peace and stability, these kind of joint initiatives - bringing together not only decision makers but also civil society, religious organisations and other stakeholders - remain important.
"I would encourage the Government...to ensure this human right is high on the international agenda, including at the UN Human Rights Council, as well as encouraging a holistic, cross-departmental approach, for example, during trade negotiations with countries whose human rights records are problematic."
