Just to start I'm gonna clarify that I'm not a sadist or anything like that.
My question is plain and simple. Did we screw the evolution cycle with modern medicine? This is not only important for our planet, but for future colonization of other planets.
The basis for that question is since the dawn of time the weak individuals die and the stronger ones pass on their genes, making their species better in the long term.
Us humans, we screwed that by starting to study everything about the body and how it ticks so that we could fix many things that would kill us (as we continuing to do so).
On the other hand we're always finding/creating other diseases like MRSA, climate change is also creating heat waves that kill people, pollution is also affecting a lot of people, etc.
So is evolution stopped or just different than before?