Money

Britain  was getting more and more money from its cotton trade.  

Samuel Greg's family was used to finding new ways of making money, and it could be expected that Samuel would engage in a trade that would be successful.  he was fortunate that he inherited his uncle's business, a textile business, that was already doing well.  

The price of cotton at the time was becoming cheaper because new machines could spin cotton more quickly.  This meant if Samuel's new business used these new machines, he could also sell the cotton at a lower price.

The demand for cotton was huge at this period of time, and since people were selling cotton at lower prices, the people also bought more.  Not only were people spending more money in Britain but people abroad were as well.  This increased Britain's trade, making more money and making the country richer, which continued the cycle. 

Technological Change

Technological change is part of the reason why Quarry Bank Mill was so successful.  New technology enabled speed and quality at the same time.  

Britain's trade in textiles was becoming less and less domestic because the new machines could not fit in cottages or small workshops any longer.

The better ways of making iron and use of cheaper coal made the new steam- driven mills much more profitable.  The new ways of making iron also improved the machines for spinning and weaving.

The Skill and Vision of Individuals

Another fact that helped Quarry Bank Mill to be so successful; was Samuel himself.  His family, as we already mentioned were used to finding new ways of making money and Samuel being a serious, hard-working, energetic man built a successful mill with the newest technology.  He was also clever enough to build his mill near a fast flowing stream that initially powered all the machines in the mill.  Later, this abundant supply of water could be used to make steam.

Geography

Samuel spent a whole year looking for the perfect place to build his mill and the fact that the mill was built near a fast flowing stream is one of the smartest thing Samuel did to make his mill successful.  If he hadn't built his mill at this location, he would not have had the unlimited power to make all his machines work and his mill most probably wouldn't have been nearly so successful.