R version 3.2.3 (2015-12-10)
Platform: x86_64-w64-mingw32/x64 (64-bit)
Running under: Windows >= 8 x64 (build 9200)

[...]

other attached packages:
rgdal_1.1-10
gdalUtils_2.0.1.7
RPostgreSQL_0.4-1

library(rpostgis)
conn <- dbConnect(drv = "PostgreSQL", host = "localhost", dbname = "rpostgis", user = "postgres", password = "postgres_password")

library("rworldmap")
world <- getMap()
pgInsert(conn, "world", world, new.id = "gid")

world.db <- pgGetGeom(conn, "world")