How did Auguste Comte and Herbert Spencer differ?

Auguste Comte and Herbert Spencer both contributed to the development of sociology, but they had distinct approaches and philosophies. Comte is known for founding positivism, emphasizing the importance of empirical observation and the scientific method in understanding society, and he proposed a linear progression of societal development from theological to metaphysical to scientific stages. In contrast, Spencer is famous for his application of evolutionary theory to social theory, coining the phrase "survival of the fittest" and advocating for the idea that societies evolve naturally and should not be interfered with by government actions. While Comte sought to actively shape society through scientific knowledge, Spencer believed in a more laissez-faire approach to social evolution.