Human Evolution - Speciation

I was wondering if anyone had any knowledge as to if choices that humans make today and alter the genetic code of their offspring.For example..if one civilization were to excessively drink alcohol and avoid excersize while eating only manufactured foods, and another were to do the opposite, could this over time, and over many generations cause a genetic mutation of one or both societies?P.S. Thes "civilizations" are completely isolated from one another

Yes that sounds like it would be a preferred title as it is more specific. I'll do that. hehe, im still new to the site and im re-learning words I havent used for years. Thanx!

Hmm..you know I think its helpful that you bring up eugenics. Just a side note for Dormammu or anyone who posesses knowledge: just how many traits can the technology that we posess pick up from genomes as of today?I've been hearing about sometime in the future couples could potentially "choose" just what kinds of traits they would preferr in their offspring. (hair color, eye color, intelligence, athleticism, ect.) I'm not well-informed about such experiments but I can definately see an ethical problem with such scientific practices. Anyone with knowledge of these practices or links to sites is definately deeply appreciated.
Dormammu, you mentioned "If a couple knows they have the ressesive genes for a harmful disease they might take steps to make shure that their children don't inherit the disease"..what kind of "steps" are you referring to? I'm not sure if you mean PREVENTIVE steps or simply a "heads up" so treatments can be arrranged.
Also, how successful are we at this time in detecting likelyhood of illnesses/diseases in ones later life?

I appreciate the example given about how alcohol consumtion affected the genes of the europeans. I'm sure that they had some kind of dehydration problems back then..I wonder if being chronically dehydrated mutated the genome of europeans at all...?Anyways, given this example...I'm curious if high levels of physical exertion throughout a lifetime from generation to generation could potentially mutate genetics.

I wonder, are there any instances wher humans genetically mutated because of intense physical exersion? ei:slavery

Intresting, Lam. So other than random mutations, natural selection is the only other way you will see genetic changes in the overall slave class.

Do you have a link about Chornobyl?
I'd appreciate that.

So since I know very little about mutation, I'm curious...can ANY environmental condition [or change in condition] potentially mutate a living organism or is there a certain criteria that governs this?

Am I anywhere near correct if I say that the only way to conclusively cause POSITIVE mutations without the risk of negative mutations is through natural selection? I beleive that this notion was brought up earlier with the mention of eugenics.