Comparitive study.

 Comparing various philosophers and determining which one is followed mostly all over the world is a complex task, as philosophical schools of thought and their followers vary greatly across different cultures, regions, and time periods. However, there are a few prominent philosophers whose ideas have had a significant influence on global thinking. 

1. Aristotle: Aristotle, a Greek philosopher, emphasized the importance of reason and logic in understanding the world. His ideas on ethics, politics, and metaphysics have had a profound impact on Western philosophy and are still widely studied and followed in many academic institutions.

2. Confucius: Confucius, an ancient Chinese philosopher, focused on ethics, moral values, and the cultivation of virtue. His teachings on relationships, social order, and the importance of personal growth have influenced East Asian cultures, particularly in China, Japan, and Korea.

3. Buddha: Siddhartha Gautama, also known as the Buddha, founded Buddhism based on his teachings on suffering, the nature of reality, and the path to enlightenment. Buddhism has spread across Asia and has followers worldwide, emphasizing compassion, mindfulness, and the pursuit of inner peace.

4. Immanuel Kant: Kant, a German philosopher from the Enlightenment era, emphasized the importance of individual autonomy, reason, and ethics. His ideas have had a significant impact on moral philosophy, particularly in Western societies.

5. Friedrich Nietzsche: Nietzsche, a German philosopher, challenged traditional moral values and religious beliefs, advocating for individual freedom and the creation of one's own values. His ideas have influenced existentialism and postmodern thought.

6. Karl Marx: Marx, a 19th-century German philosopher, developed the theories of socialism and communism, emphasizing the role of class struggle and the critique of capitalism. His ideas have shaped political movements and social theories globally.

It is difficult to determine which philosopher is followed mostly all over the world, as the influence of these philosophers varies depending on cultural, historical, and ideological factors. However, in terms of widespread influence, Aristotle's ideas on reason and logic have had a significant impact on Western thought, while Buddha's teachings on compassion and mindfulness have gained followers from various cultures around the world. Additionally, the impact of Marx's ideas on socialism and communism has been particularly significant in the realm of politics and social theory. Ultimately, philosophical influences are diverse and often dependent on specific contexts and individual beliefs.