... not always, for example the more undesirable trait of jealously and aggressiveness as it has no social purpose in today's societies, both the biological and the evolutionary explanations mentioned above gives more very plausible explanations for this. Once we are born the main concern of everyone around us is whether we are male or female, before the birth older siblings may be ... ...

• Word Count: 2036
• Approx Pages: 8
• Has Bibliography
• Grade Level: Graduate