The world's need for some kind of international regulations will become "absolutely essential" within this generation, a specialist on disarmament declared yesterday.

Rapidly converging forces of social and scientific change "are making our world qualitatively different from anything we have known in the past," said Dr. Thomas Lough, a research psychologist with the United States Arms Control and Disarmament Agency. . . .

Although the spread of nuclear weapons is among the pressures for internationalization, the move toward some degree of enforced world order would continue even if the weapons did not exist, Lough stated.

He cited these other forces of change:

The rapid growth of population, which is expected to double in about 35 years.

A steady increase of about 10 percent a year in the number of people who travel from one country to another to live, study (and) engage in other activity besides work or business.

An increase of 5 to 6 percent a year in worldwide mass communication, as reflected by such factors as ownership of radios, consumption of newsprint and literacy rates. . . .

Little serious thought was given to world order in the past because nations were separated by distance, travel limitations and ignorance, Lough said. But a true world community is in the making and "no community can exist without some amount of government," he asserted.

The spread of nuclear arms will hasten the development of international controls because without them "we are likely to blow ourselves up," he said.