Insects evolved from a group of crustaceans. The first insects were land bound, but about 400 million years ago in the Devonian period one lineage of insects evolved flight, the first animals to do so.
Joseph Stalin was able to establish such a strong communist presence in Eastern Europe following World War 2 because of strong military, economic, and diplomatic pressures.
the legislative branch passes laws,
the executive branch enforces laws, and
the judicial branch interprets laws