There are different definitions of what makes a man human, but the Institute for Creation Research believes that serving God and others are qualities that imbue man with humanity. The Art of Manliness also notes that one trait men should have is the willingness to provide for those who depend on him. Logic, reason and intellectual capacity also gives man the ability to react to challenges and overcome obstacles.
The Art of Manliness goes on to say that aggression can be an inherent trait in men. Pursuing goals through self-interest often plays a role in defining a man as well. As posted on a University of Wisconsin-Whitewater web page, the social humanist Gajo Petrovic states that the essence of man is freedom. A man thrives as a free person living in a free society. The Declaration of Independence declares "that all men are created equal, that they are endowed by their Creator with certain unalienable Rights, that among these are Life, Liberty and the pursuit of Happiness." Chad Howse Fitness also states that treating women with respect truly makes a man human, along with others around him. A man should also have leadership qualities and the yearning to push himself to reach his desired goals.
Daniel Criswell of the ICR also notes the literal and scientific definitions of what makes a man human, such as DNA sequence and behavior patterns that are different from other animals.