Hi bspkumar. Not too many problems. My change to the second sentence about the Salt March is worth explaining a little. As you have written it ("... the British salt tax which played a major role ...") there is a suggestion that the "tax" has played the role, when you really mean the "march" has played the role. It is almost immediately clear what you intend to say but I think you can see that this sort of construction could be very ambiguous in some contexts. By breaking the sentence into two it clarifies the point.
Also, because this is all conditional on Ghandi and Diamond traveling with you, it must be "I would learn", not "I will learn", in both instances.
The first person I would choose to travel with is M.K. Gandhi. First, I would like to brief you about the “Salt March” led by Gandhi against the British salt tax. This march played a major role in uniting the people of different religions, castes, and regions to fight for independence. Here, Gandhi’s choice of the salt tax to fight against the British was very important. Explaining his choice, Gandhi said, “Next to air and water, salt is perhaps the greatest necessity of life.” He also explained that it would build unity between Hindus and Muslims by fighting for a common issue. Yes, he was correct, India is a tropical country and sweating necessitates a greater intake of salt. Such an item of daily use could resonate with all classes of citizens.
We can understand his leadership and strategic skills and his knowledge of human psychology and public relations from his activities in the independence movement. Now, key business thinkers are preaching how corporate India needs to revisit Gandhi's ideas and apply the lessons learnt from him to their leadership styles. I would learn the above mentioned skills from Gandhi.
Secondly, I would choose Jared Mason Diamond, an American scientist and author whose work draws from a variety of fields. He is famous for his books "Guns, Germs, and Steel" and "Collapse: How Societies Choose to Fail or succeed". In the first book, he explains how the cultural and genetic differences created by the influence of geography favored the Eurasians civilizations and helped them to survive and to conquer others. In the later work he explains how environmental, cultural and political factors influence the collapse of the society and he also suggests remedies for the same. I would learn how science can be effectively used to understand and resolve complex Socio-Economic issues.