The concept of sustainability is concerned with achieving and maintaining development on a steady path to the future. Sri Lanka has made substantial gains in poverty alleviation, controlling population growth, achieving universal education, and ending the civil war but the challenges of inequality, social cohesion, peace, environmental degradation, disaster management are of still much concern. The Earth Charter calls for an “integrated approach to addressing the interrelated problems confronting the world community, and that this ethical framework involves respect and responsibility for the community of life, ecological integrity, social and economic justice and equity, democracy, alleviation of poverty, non-violence and peace” (see http://www.earthsite.org/EarthCharter.htm. Accessed on 6 April, 2011). Education, thus, is the most important intervention for achieving peace, harmony and social cohesion as an integrated approach to addressing societal problems confronting the country and create conditions for sustainable development.