Abraham Maslow (a famous psychologist) once commented, 'if all you have is a hammer, everything is a nail'. Investors currently have a hammer, and that hammer is economics.

Transport, natural disasters, the distribution of resources, globalisation – engineers and inventors have the traits and skillset to solve the problems the world faces today. And therefore have the potential to impact the world and economy. The economy can be boosted by exporting tangible technology that is in global demand. This is the hands of engineers.

Power is relational; we talk about seizing power but ultimately – at least in democratic societies – you need the followers to be powerful, and it's important therefore for us to understand the cognitive biases that mean that we keep gravitating towards people who are clearly unfit for the job.

Doing something which has a social purpose gives you the motivation to overcome the hurdles and obstacles that you will meet along the way. It gives you that inner strength when you're doing something and you know it's making a massive difference.

We needed to shift the media economy off a dependence on online advertising, and we needed to change who the customer is. Both things are possible with paid subscriptions because it's trust rather than content that gets monetised.