When asked "What's the hardest thing about going to the moon?" Wernher Von Braun replied "The will to do it."
We can land a man on Mars. We can do it in the next 50 years, if not in the next decade. We just don't have the will. The Apollo days are over, and it will take some visionary who is not yet born to bring them back.
No it won't take a visionary, only a change in political landscape. It has been tried more than once, but the fact that it isn't pressing to most of us in walking life other than our immediate needs.
Otherwise as we all know, space probes are the future. I think by the end of this century if Humankind is still around, a lot can happen in that time, or going into the next century a return to the Moon and a mission to Mars can or will take place after a first return to the Moon.
Even if just the Mars mission definately, end of the century going into the next.
Compared to the Moon, where there is no safe location with exception of Malapert, shackleton crater for an outpost with difficulty, the galactic cosmic rays hitting the surface mean that modules with personnel can only remain on the surface anywhere for a year if practical.
Mars's surface would need a shelter for the modules as Mr Aldrin has illustrated for a long stay.