It may have been easier for wealthy social groups to unite because they often share similar interests and goals, such as protecting their wealth and status. Additionally, they may have had more resources, such as education and financial means, to organize and unite. For example, during the French Revolution, the upper class and wealthy landowners, known as the "nobility" united against the commoners and the rising middle class, in order to maintain their privileges and power.
On the other hand, it may have been harder for poorer social groups to unite because they often have more diverse interests and goals. For example, different segments of the working class may have different occupations, cultures, and languages which can make it difficult to find common ground. Additionally, they may have fewer resources, such as education and financial means, to organize and unite. For example, during the Industrial Revolution, the working class was divided by their different trades and skills, and it was difficult for them to unite against the factory owners and capitalists.