BLUF

Putin claimed that the Soviet Union's collapse was the "greatest geopolitical catastrophe of the 20th century "—implying that Ukraine and Russia are one country and should not be separated.

Summary

Note the map above shows the extent of the pre-1991 Soviet Union. All the countries in pink are now independent.
This article by Greg Myre in NPR makes the following points:

References

Recent Runway Posts related to this topic:
References from the Web:

Source: NPR