I once heard the phrase "less war - less peace" - very appropriate for these odd times.
From last December: New MI5 chief says UK facing 'nasty mix' of threats - BBC
Russian, Chinese and Iranian espionage and disruption is all growing in severity and complexity, said Mr McCallum.
The threats are to people, the economy, infrastructure, academic research and democracy.
MI5 has an operational role in investigating certain individuals and disrupting their activities, and a protective role building up UK's resilience in the cyber and physical spheres.
Dealing with China requires a complicated balance, he said.
He said there is a need to work with China on issues like climate change, but at the same time to be robust in confronting its covert activity.
New legislation is expected to make a big difference in bringing the law up to date in criminalising what foreign espionage agents get up to inside Britain.
Mr McCallum used a meteorological analogy, saying Russia was like bad weather but China was a far greater challenge in the long-term and more like climate change.
More recently: Into the Grey Zone - SkyCovert Attacks
Proxy forces
Stealing vaccines
Crafted lies
Influencing voters
Supressing debate
Energy as power
All things we can expect from certain regimes.