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What you have is a misconception of the process of evolution. Evolution is an on-going process, one that doesn't end or have patterns. Things evolve to suit their environment and the circumstances at the time. Walking erect and growing taller was beneficial as the human species developed, but circumstances are always changing. One could argue now that we live in a sophisticated and self-aware society, increased brain power and computing skills "evolve" further. The only "unnatural" evolution for anything would be introducing new genes are altering the ones we already have. However, species of all kinds, including humans, will always be evolving on their own to suit the current situation.

You're making quite a few assumptions there, friend.

Firstly, we're not all getting weaker and smaller with each passing generation. Life expectancy is higher than ever, and world records continue to be broken for feats of physical prowess. Americans are among the largest people on record in the history of the planet, and although they're not healthy, they're definitely not getting shorter or skinnier. Contemporary society even seems to be having a renaissance of physical health, with the big scares of childhood obesity and diabetes/heart disease in adults spurring the movement on.

Second, smart people have sex too, just more intelligently, meaning so as not to get pregnant when they aren't ready for it. But sex and kids still happen, even to smart people.

Third, smart people don't always marry smart people, and the same goes for stupid people. Your definitions of "smart" and "stupid" seem rather limited, which makes you ignorant in your own way (note, this is in no way meant to attack your intelligence, you seem like a rather intelligent fellow as far as I can tell).

Fourth, smart people have kids, like mentioned above. The number of professional parents is on the rise, and so is the number of stay-at-home dads.

Fifth, smart people don't always have smart kids, and stupid people don't always have stupid kids. Parents and genes matter, but so does upbringing. There's plenty of kids who are the first in their families to go to college, sometimes the first in their families to graduate high school. Just because some people don't have an education doesn't mean they don't want their kids to get one.

Lastly, you're making the same mistake that spearquest made, and that's thinking that there's a positive and negative path to evolution. There isn't. Evolution just happens, it doesn't progress or degress to some good or bad outcome. Lifeforms will change to fit their environment, and those that survive to reproduce will be the ones whose genes get passed along. It doesn't matter how "good" your genes are if there's no desire to pass them on, so those creatures with the "good" genes may be considered to have "bad" genes of not wanting to continue their lineage.

What are you confused about?

Evolution hasn't stopped but what we're doing to ourselves is moving a whole lot faster than evolution could ever imagine.
Also evolution is being ruined because we've found so many other ways besides natural selection to fix our problems. In a perfect evolutionary world the blind, deaf, diabetic would all die and never reproduce thereby killing off that disease from the gene pool. But for better or for worse people love blind, deaf, diabetic people... and so their children will be in danger

ok, evolution is a slow process. and many make the assumption that we are.. at this moment in time.. at the height of our evolution and the buck stops here. but that's just because evolutionary changes happen over so long a period of time we dont notice it. for example, we age a little more each day, but we dont see it happening from day to day. each day we are slightly different from the last. this is not evolution per say, but evolution is a lot like that, only one a much grander scale.

the problem we have today, is that we are evolving technologically a lot faster than ever before, and that likely also impedes our evolutionary progress. up until the early 1900s our technological progress was comparatively slow. we've advanced amazingly over the last 100 years. or maybe it will re-direct the evolution of our species... maybe a 1,000 years from now we'll look like aliens. who knows?

but evolution itself doesnt just stop.

@bold.. I dont know about that. food supply may have something to do with it, but not medicines. a persons stature is more determined by their family genetics and that of the dominant race their family belongs to. whatever the evolutionary reasons are that determine how tall or short on average a race of people are, I dont know. it could do with food supply but then it would also be directly connected to the environment our ancestors lived in as well, since it's the environment that supports the food supply.
one could argue that available medicine is also determined by the physical environment of the race, but even in todays society some of the richest and most well fed people (so, being rich they'd have access to good medicine and vitamins) are still short. it's 'cause it's in their genes to be short.