Why was great britain the starting point for the industrial revolution?

Because great Britain had all of the supplies such as coal and iron ore that was needed for the maturating process 

1) population growth
2)movement of workers to cities to provide labor force
3)plentiful resources; ports, rivers, canals, access to sea, coal, and iron
4)skilled inventors 
5)accumulated needed capital to start businesses
6)stable government
7)no river tolls
8) powerful british navy 
Hope this Helps!