People are not addicted to medicines as you claim.

Nuclear weapons are no longer being used as a deterrent factor and most countries have agreed to not use them in war so the point of how powerful they are is not an issue if they are never used

Man has always made his livelihood of technology a horse and plow are a type of technological tool as is a hoe, sickle, and any other farm instrument you can possibly devise. As long as there are people there will always be technological advancement.

Feudalism was an extremely oppressive and violent form of government with wars constantly being fought with neighboring lords over land and resources. Poverty ran rampant and the overall standard of living was low unless you were a lord.

Your last reply shows how easily misguided and ignorant many people can be today. You assume that humanity is not part of nature but separated from it; on the contrary we are an integral part of the workings of the world. Your statement that the world has declined drastically, I believe that it is an insult to the world as a whole the world is getting along fine, and is constantly changing. You cannot stop change as change is the only constant in this world. You also make a statement in replenish and refreshing the earth. What, may i ask, is depleted in the world or unrefreshed? If you are talking about the environment, then I take it you must live under a rock and have never been outside. On the deforestation of the rain forest for instance, while i agree it is a travesty and could be handled with more care, we are along way off from completely destroying it and continue to make great strides in the conservation and preservation of the areas in question.

Lastly on you statement of prolonging the earths existence, how would limiting humanity prolong the existence of the earth? The earth is a massive ball of rock and at the current time, we do not have the capability or the resources to destroy such a thing. If you know of a way of completing this monumental task please enlighten the rest of us.

I believe that you should take in consideration of the context of genetic modification. If you are modifying traits like diseases and genetic disorders then yes i think it would be a worthwhile endeavor but if you want to modify people for traits like strength, intelligence, and so forth then i think it could create a few ethical dilemmas that would be difficult to solve. In the case of adaptation for space travel, I think that humanity will probably solve these issues with technological solutions rather than genetic. Also, if you modify a person to live in space you may limit their ability to live on a planet.

aha you forget the incredible "Infinite Improbability Drive!"

FTL travel would be possible with this type of propulsion system because of the way it bypasses light speed. Instead of moving the ship, you are moving the space around the ship so since the ship isn't technically moving you wouldn't feel the motion of the craft.