The laws from many years ago I think
Europe would be in contact with lost knowledge sooner that in reality happened. As the arab nations were more civilized than some others, the cities were preserved and the really important work of the romans would be preserved and enhanced. The gods statues were destroyed and Islam would be the only religion.
As the Soviet Union dissolved and the cold war ended the balance of power in Europe and especially Eastern European changed forever.
While earlier, the Soviet Union held sway over much of Eastern Europe, that completely disintegrated overnight. The Soviet influence in the region was shattered.
On the edges of Eastern Europe were the NATO countries, who quickly became the dominant political and military force in the region without any rival.
Communism and socialist policies also ended as newly freed countries started to transition to market-based economy.
