Should Corporate Social Responsibility be mandatory for every company in the world or something optional for whom want to be leader in its industry?

Corporate Social Responsibility will always be optional as it is a voluntary contribution of money and time as a form of giving back to society (voluntarily).  However, this type of social responsibility, if incorportated into the mission of the organization and followed throughout the corporation's indeavors and operations will result in many returns and higher success.  

People tend to choose companies that provide enviromentally friendly products and services as a way of translating their own sense of personal responsibility to the environment and society in which they live.  Some of the most succesful companies have used this method of 'giving back' in order to remain ahead:  Starbucks, The Body Shop, Tom's Shoes, etc..

An organisation that produce goods that should enhance quality of life on this earth. Such organisation must become a market leader. This kind of organisations will have natural inclination towards to the society's welfare and will assume social responsibility not by law but by high morale within. There are smaller organisations in millions but unnoticed, does CSR within their resources. Local knew but others may not like some Corporates do noticeably. None can make this as mandatory.