Question

Why is second half of 19th century called the age of association?

Answer 1

The second half of the 19th Century called the age of association because people form association and  discussed on particular subject of particular topic.

Explanation:

All of 19th century has seen the emergence and growth of many associations.  

Thus, famous literary figures such as Cambridge scholars Dr. Anil Sil, in his book' The Emergence of Indian Nationalism includes the Competition and Collaboration in the Late Nineteenth century has given this period the name and term  which we know as "an age of associations".

Compared to the layman, "the age of collaboration" means that all the tools required to be an involved and participating digital community are available as and where appropriate free of charge.