New Delhi, Oct. 23 -- Prime Minister Narendra Modi on Friday called for greater social unity, self-reliance and a renewed commitment to India's spiritual and philosophical heritage, saying the ambition of building a developed nation by 2047 required collective effort and a stronger sense of national responsibility.

Inaugurating the three-day Chinmaya Amrit Mahotsav Global Sammelan at Bharat Mandapam in New Delhi, marking the culmination of year-long celebrations commemorating 75 years of the Chinmaya Mission, Modi urged the organisation to use its spiritual, educational and cultural network to address emerging social challenges and contribute to the country's development.

"Today, we have to unite society against forces that seek to divide...