The philosophy of realism promotes the idea of a universe that we can observe scientifically and understand objectively. The central idea of realism is that reality, knowledge, and facts are independent of the human mind. The real objects of the universe—stones, trees, animals—exist whether or not there is a human mind to know them.
Realists believe that anything that exists can be measured scientifically. Philosopher and mathematician Bertrand Russell believed that reason, logic, and the methods of science could be used to build a precise philosophy of reality. Russell felt that the universe is characterized by patterns that can be analyzed scientifically and verified mathematically. He believed that only science could claim to be real knowledge. According to Russell, we can get two types of data on reality: hard data and soft data. Hard data are the facts of the situation, facts that can withstand measurement and analysis. Soft data are such things as beliefs, passions, and emotions, which we can neither prove nor deny with certainty. Russell based his philosophy more on hard data that can be proven and less on soft data that are more difficult to prove. He argued that we should not believe something is real if it is based on soft data. Something is real only if hard data exist to support it.
Russell hoped that by using the methods of science, we could begin to solve large human problems such as poverty. He believed in knowledge and education as the keys to a better world. According to Russell, if we applied realist philosophy and scientific methods to education, we would achieve excellence in education, and ultimately we could eliminate problems such as poverty and create an ideal society.