Mars colonization is a long sought after dream. Doing it is going to be expensive and difficult. If we succeed it will stand as a milestone of human desire and ability. When we succeed we’ll say either “well, we did it” or “imagine what we have found and now know”. The philosophical and social significance will be staggering. However you look at it is a grand achievement. 1st step is a self sustaining Lunar colony where we can “get our feet wet” and begin to understand what living off Terra demands and means. With a Lunar base coming and going should be simpler as we’re already in “space”. When we begin to colonize extraterrestial places we may learn just how valuable our home world really is. How many more generations will we dream about this?