Under the generous conditions that Carlo offered him, his gratitude toward Carlo was genuine.
Maxim came from a humble background, and it was through his diligence and willingness to learn that he secured a job. When Carlo was willing to offer him a higher-paying and more preferred job, Maxim naturally didn't want to miss this opportunity, which was also why he convinced his brother to come with him to Spain.
Compared to staying in the United States, Maxim was more willing to leave and go to a new place.
The reason was simple: by this time, the United States had already formed a huge capitalist force, and capital's attitude toward inventors like him was not very friendly.
Of course, Maxim wanted to earn an income through his inventions, but the reality was harsh. Companies started by inventors like him would face suppression from other capitalists, which is also the historical reason why Maxim eventually left the United States for the United Kingdom.
