Not sure if this relates to India and tribal communities but here is an overview of globalisation and its impact on social exclusion

Chapter Social Exclusion: New Inequality Paradigm for the Era of Glo...

But short answer is that it is neither a curse or a boon, its more mixed in its impacts.

Have these communities organised in any way?

If you haven't already, have a read of Lalrinliana and Kanagaraj (2008) 'SHGs and Tribal Development in Mizoram', which focuses on a a state in Northeast India. It interested me to find that self help groups (SHGs) are being perceived as vehicles for development and empowerment in such areas of the third world.

Thank you professor Ronaldo Munck and Sir George Gunn for your prompt responses. It filled the much needed gaps for my project.

It carries positive and negative consequences but in one way it is inevitable and as such there should be a selective approach to using what is good and beware of the not good for the context of the respective area. Challenges are going to remain and its an ongoing process of assimilation and living.