We're not evolving right now. Technology, especially medicine, has allowed humans to survive and multiply who would otherwise not multiply, sometimes not even making it to term. Medicine has also allowed us as a whole to multiply so rapidly that we did create this problem of eventual scarcity in the first place. If we don't destroy ourselves (Carl Sagan thought we would nuke ourselves, and was arrested multiple times during anti nuclear weapon protests), then we might go to space.
However, at least here in America, the attitude is not right. Sure, many people are interested in space, but it's only a passing interest. Look at who makes the most money. Generally it's those sports stars and movie celebrities (at least they get the most attention, sometimes for very stupid things. Who cares how many children you adopted or that you jumped on a couch on a television programme?). The people we need to be at the forefront of space exploration are oftentimes relegated to teaching at schools, sometimes with barely enough income to survive. I think the only way we will get to space is if governments fund space more, even if it isn't the most popular. Also, general attitudes need to shift more, we need to look up more.