You know class, ideally it doesn’t really matter if you have a car or other luxuries in life. Do you think a man will look better if he owns a brand new car? It doesn’t make any sense! Your physical attributes (personality included, for a good reason) are one of your best assets in which you can ever present to the multitude. Earth has already been here in our solar system for at least 4.6 billion years. The first microorganisms appeared 2 billion years later, and then the complex evolutionary process occurred gradually until such time that it molded several genera and families base on the capability of the organisms to adapt on certain climatic conditions.
Nature will naturally select those who have the greatest number of advantageous traits. Those who do not have advantageous traits will soon disappear since traits will not be passed on to the next generation. Moreover, it will create a stable gene pool given at the right environmental condition.
But then again, we humans are so intelligent that we actually seek for practicality. We do not think of the possible detrimental effects to the future generations base on the way we choose our own lifetime partners. It may sound superficial to you, but think of it this way: If we continue to choose luxuries of life over the person per se, time will come that the next generation will have less advantageous traits and might lead to an event that we do not wish to happen.
These are some of the things that I wish to discuss if ever I teach Evolutionary Biology in the near future.