1884-1942 1889-1951 192 20thcentury anthropology bronislaw ethnology exhibitions expositions history intellectuallife internationalrelations kula(échangecérémoniel) kulaexchange ludwig marekj moeursetcoutumes papuanewguinea poland sexcustoms sexualbehavior sociallifeandcustoms trobriandislanders trobriandislands wittgenstein worldpolitics