After 1931, some isolated groups of Jehovah's Witnesses came to distrust instruction from outside the local area. Some preferred their autonomy even after persecution and isolation abated, such as in Germany following World War II, in Romania following the overthrow of Nicolae Ceauşescu, and in the former USSR following the Cold War. Beginning in the 1990s, other former Witnesses used Internet technologies to group themselves around shared ideas such as numerical analysis of the Bible, or a wish to embrace some but not all of Jehovah's Witness beliefs and practices.