Growing up, my mother always told me not to believe everything I read. This was good advice, but it doesn’t go far enough.
Critical thinking is an ancient concept but the actual term began to appear in the mid-20th century. In the information age, developing this skill is essential. It is an intellectually disciplined process of actively analyzing and evaluating information. It transcends all subjects, sources, or problems. Critical thinking protects us from biased, distorted, partial, uninformed, or prejudiced content and ideas. It insulates us from improper assumptions and implications. It prevents undesirable consequences.
Critical thinking is not the application of logic for selfish purposes. Selfishness often appears under the guise of critical thought to skilfully manipulate ideas to promote a vested interest. Fortunately, this usually becomes apparent upon close examination because selfishness typically accompanies lies and an intellectually flawed argument. Examining the issue fair-mindedly, and with true intellectual integrity, the selfish analysis falls apart. Of course, the selfish minded individuals will call the product of true critical thinking idealism, using that term in a pejorative sense, thus further identifying their selfish motives.