Globalization during the Second World War wasn't as big as a thing then as it is now. World War One largely disturbed the pre-existing informal globalized routes built up during the Industrial Revolution. And the Interwar and Second World War period hardly had much in the way of globalized management as exists now (The pre-war years lacked for instance the Bretton Woods Conference which established such things as the IMF and World Bank). Economies in the forties could be largely self-sufficient or they would have shifted trading partners or found new access to the resources they needed. Great Britain severing trade with the Nazis was something of a formality, to starve the Germans they really had to target their fuel production directly in bombing raids and attacking fuel convoys directly and it wouldn't have effected them.

Nowadays we got a whole lot of international bodies dictating the direction, growth, and flow of finance and production. IMF and World Bank keeping international money transfers moving along. OPEC for oil, and the rise of trade blocs like NAFTA, the EU. Such organizations have existed before, but their creation and establishment greatly surged in the 60's to the 80's and then again in the 90's with the formal collapse of the USSR leaving behind a lot of independent nations. There is also the very international [url=https://upload.wikimedia.org/wikipedia/commons/9/9a/WTO_members_and_observers.svg]World Trade Organanization[/url].

Major trading blocs:
[img]https://upload.wikimedia.org/wikipedia/commons/3/37/Economic_integration_stages_%28World%29.png[/img]

This is not to mention that a lot of important industrial architecture is often shared between states or regions. Russia for instance pipes oil directly into Europe, which makes economic sanctions a lot harder. Though at the same time the Saudis and OPEC can informally sanction Russia by dropping the price of oil well below the price the Russians would need to benefit off of oil production and not go into debt (and in effect become the international version of the Rockefeller family).

Apart from greater international trade on and more energetic regional and international level there is the latest advancements in communication technologies which affords us all the ability to shout at others from much further away and socially connect us to people like in Ukraine. Depending on how stoutly Putin wants to censor the net to keep Ukraine out of it, or on how avid the Russians are in keeping to the Russiky corner of the internet.

Though however there's some predictions out now that post-depression we may go through a period of deglobalization, which means more jobs for American robots and more eventual freedom to do whatever without too much threat (Russian economy is still tanking from their current actions). But these reports are from 2009 so still mid-recession doomsday predictions.