Secularism is धर्म निर्पेक्षता और पंथ निर्पेक्षता

In the episode 7, Swami ji elucidates on secularism and colonialism in the context of sanatan dharma or Eternal Principles. I think that these episodes have a bearing on how we lead ourselves, and that's important to lead business, institutions and society. The luminaries of India (Bharat), who framed the constitution, did not include secularism then. Why was it amended later? Did you know that our original constitution had a picture of Ram. What was the reason for this? What was the thinking?