1876-1944 20thcentury 846 africaninfluences andré asimilacioncultural authors biography blacks civilization contributionsincubanethnologycabrera contributionsincubanethnologylachatañeré contributionsincubanethnologyortiz correspondence cuba culturalassimilation ethnology etnologia fernando france french frenchliteraturecorrespondence20thcenturycriticaledition jacob jewishauthors klimentefremovich lydia marshals max negros rómulo salmon sovietunion voroshilov