Thanks for your informative comment. In regards to 1948. The partition plan proposed by the United Nations but never implemented would have been unworkable. Israel would have been divided into 3 slivers of land each surrounded by long borders with the proposed Arab state/s and Jerusalem would have been isolated. See below.

Considering Israel's location and neighbours, strong border protection and control is essential. This proposed state is almost impossible to defend.

I would argue that it was the 1948 war that enabled Israel to have greater security and ultimately a viable state not the UN. The Arab nations attack on Israel was a massive miscalculation.