The Horn of Time

The 20th century played a game of nuclear Russian roulette. And lost. Man must escape his own dead world, raid hostile planets, subdue his human nature to survive in a strange cosmos. Poul Anderson explores the future in this blood-chilling narrative that spins from Earth to distant galaxies as he foretells the ultimate destiny of mankind.
The six short stories are:

The Horn of Time the Hunter
Man to My Wounding
The High Ones
The Man Who Came Early
Marius
Progress