Living as we do in this space age and computer era, the answer to whether industralisation is necessary for a country can nothing but a positive,"Yes!" but the 'yes' is not an absolute 'yes' but a qualified 'yes'.
What is industralisation? It is, in the words of the economist, heavy investment in land, labour and capital. The last, of course, will include heavy and light machinery and all of these will lead to mass production. The idea is that when the conditions mentioned above are satisfied the cost of a unit produced will become cheaper. There may be a large market and as the trade increases there may be more money in circulation. Wage earners can get better wages and so the average standard of life will go high or when the standard of life improves there may be more industries coming up depending upon newer wants and demands. Thus we see the industrialised countries of the West which have lead in industrialisation have high standards of life as compared with developing countries.
Too much industrialization brings boredom to man who loses his soul for the sake of the machine as seen in one of Charlie Chaplin's film. Urbanisation becomes a necessary evil with all its adjuncts of crowds, dust, filth and immorality.
While one should not be too spestic about industralization, one need not be over optimistic about it. One thing is sure, industrialization has not solved human misery.