Industrialisation has improved the transportation of goods, increasing people's access to food, medicine, clothing material etc. which led to improvements in health and lifestyle which raised the life expectancy of the population and allowed it to grow.
Industrialisation has also made agriculture, ranching, coal mining, and other industries much more reliable in their production of goods, due to better equipment, so there were fewer shortages of food and heating, resulting in less starvation and illness, which improved population growth
